OPINION OF THE COURT
ADAMS, Circuit Judge.
The present controversy inhabits the twilight area of developing law concerning the constitutional rights of the involuntarily committed mentally retarded. Nicholas Romeo appeals, through his next friend, from a jury verdict for the defendants, officials of the Pennhurst State School and Hospital, in a suit brought pursuant to 42 U.S.C. § 1983 (1976). Plaintiff alleges trial errors in the admission and exclusion of evidence, in the court's instructions to the jury and in the manner in which the trial was conducted. Because of the improper exclusion of relevant expert medical testimony and critical flaws in the standards that were employed in charging the jury, we vacate the judgment of the district court and remand for a new trial.
While courts in the past decade have carefully focused on the procedural protections applicable to the initial commitment of the mentally handicapped, see Parham v. J. R., 442 U.S. 584, 99 S.Ct. 2493, 61 L.Ed.2d 101 (1979); Addington v. Texas, 441 U.S. 418, 99 S.Ct. 1804, 60 L.Ed.2d 323 (1979), relatively little has been resolved with respect to conditions of confinement or the extent of the state’s duty to protect and to treat the institutionalized. Specifically at issue here is the judicial responsibility to enforce constitutional guarantees governing the incarceration of the institutionalized retarded.1 This, in turn, calls on us to deal with the question of what standards of proof are required in a § 1983 suit for damages, in which a mentally retarded plaintiff claims that the defendants improperly shackled him, failed to provide adequate protection for him, and did not make appropriate treatment available to him. In defining the principles relating to claims for protection and treatment of the retarded, carefully crafted instructions must be utilized that will reflect the duty of courts to safeguard the constitutional rights of those confined, but also will be sensitive to the prerogative of the medical community to exercise its professional judgment and to the undeniable fiscal and administrative concerns of the state.
I.
Romeo is a profoundly retarded person. Although he is physically thirty years old, [155]*155he suffers from a chemical imbalance of the brain that renders his mental capacity approximately that of an eighteen month old child. For the first twenty-six years of his life Romeo lived with his parents in South Philadelphia. On May 10, 1974 his father died. Within a month his mother, finding herself unable to care for him, applied to the Philadelphia Common Pleas Court for his admission to a mental retardation facility. On July 11, 1974, the court committed Romeo to the Pennhurst State School and Hospital, pursuant to the involuntary commitment provision of the Pennsylvania Mental Health & Mental Retardation Act of 1966. Pa.Stat.Ann. tit. 50, § 4406 (Purdon) (1969).
It is not contested that, while confined at Pennhurst, Romeo was injured on over seventy occasions. These injuries were both self-inflicted and the result of attacks by other residents, some in retaliation against Romeo’s aggressive behavior. The injuries included a broken arm, a fractured finger, injuries to sexual organs, human bite marks, lacerations, black eyes, and scratches. Moreover, some of plaintiff’s injuries became infected, either from inadequate medical attention or from contact with human excrement that the Pennhurst staff failed to clean up.
Since Romeo is incompetent, this action was brought on his behalf by his mother as next friend. The § 1983 complaint seeks damages for the described injuries from three officials at Pennhurst: C. Duane Youngberg, then superintendent, Richard Matthews, director of resident life, and Marguerite Conley, director of the plaintiff’s assigned unit at the time most of the injuries occurred. There is evidence which indicates that each defendant knew of some or all of the seventy-plus injuries suffered by Romeo.
After the case was filed, the district court permitted the plaintiff to amend the complaint to include allegations that, since the initiation of the suit, defendants had kept Romeo shackled to a bed or a chair in the hospital at Pennhurst for long periods each day. The amended complaint, which posited a violation of plaintiff’s constitutional right to treatment occasioned by the shackling, exposure to attacks and inappropriate treatment,2 again sought compensatory and punitive damages from the defendants.3
At the time of trial, the district court refused to permit plaintiff’s two experts. Dr. Foxx and Dr. Grover, to testify about the lack of programming and activities on Romeo’s ward, which they believed accounted for his numerous injuries, and about alternative methods of treatment that would have reduced the frequency of attacks.4 One of the experts would have testified further that the restraints served no medical purpose and were used solely for the convenience of the staff. The court sustained objections to all of this proffered medical and psychiatric testimony on the theory that admission of such evidence would transform a § 1983 action into a malpractice case.5 In addition, the court [156]*156rejected the plaintiffs proposed jury instruction which maintained that the plaintiff had a right to treatment in the least restrictive environment. The court decided instead that defendants’ shackling practices and duty to protect Romeo should be evaluated solely on the basis of an Eighth Amendment standard. Further, in what was described as an attempt to distinguish this § 1983 suit from a malpractice case, the court subjected plaintiff's claims of inadequate treatment to an Eighth Amendment standard of “deliberate indifference to the serious medical needs of the resident.”
Because we believe that the Eighth Amendment — which limits the scope of judicial review of conditions of incarceration for the criminally convicted to a “cruel and unusual” threshold — is inappropriate in the context of civil as distinguished from criminal confinement, the result reached in the district court must be vacated. Moreover, the uncharted legal issues which have arisen and the potential ramifications of this case impel us to set out in some detail the level of judicial scrutiny that should be accorded the intricate set of legal, medical and societal interests that intersect in the situation presented here.
II.
Of critical importance in this appeal is the recognition that this is a due process case, not a controversy to be governed by “cruel and unusual” principles. Although the complaint alleged Eighth as well as Fourteenth Amendment violations, Ingraham v. Wright6 and Bell v. Wolfish7 would appear to preclude reliance on the minimal safeguards of the Eighth Amendment in a non-criminal context. Ingraham held that the Cruel and Unusual Punishments Clause is inapplicable in the context of corporal punishment in public schools; Wolfish found Eighth Amendment scrutiny inappropriate for evaluating conditions of pretrial detention.8 Indeed, Wolfish explicitly recognizes a right of innocent persons to be free from punishment, a proposition directly grounded in the word “liberty” that appears in the Due Process Clause. See 441 U.S. at 535, 99 S.Ct. at 1872, id. at 580, 99 S.Ct. at 1896. (Stevens, J., dissenting). Thus, it is the Fourteenth Amendment’s prohibition of state deprivation of life, liberty or property without due process of law that is the appropriate fulcrum of our concerns today.
It is necessary, of course, to determine initially whether the asserted individual interests are encompassed within the Fourteenth Amendment’s protection of life, liberty and property. If the answer to that inquiry is in the affirmative, we must then determine what level of judicial scrutiny is applicable to the various interests in issue here.
We are fully cognizant that the propriety of a § 1983 claim, in the present situation, turns on whether a constitutional right is at issue. The concurrence is undeniably correct in requiring that we distinguish between constitutional violations and ordinary malpractice claims. But the implication that the existence vel non of a state remedy — for example a malpractice action — is relevant to the determination of whether a § 1983 claim exists, would appear to be unfounded. Cf. Paul v. Davis, 424 [157]*157U.S. 693, 715, 96 S.Ct. 1155, 1167, 47 L.Ed.2d 405 (1976) (Brennan, J., dissenting). Nor does the existence of treatment issues in a claim of constitutional infringement, on account of a linguistic similarity, transform the claim into a malpractice action.9 Admittedly, the plaintiff’s confinement in a state institution does not dignify every complaint with constitutional stature. Cf. Estelle v. Gamble, 429 U.S. 97, 106, 97 S.Ct. 285, 292, 50 L.Ed.2d 251 (1976). Nevertheless, there is a distinction for constitutional purposes between conduct by state actors and private citizens. Therefore, understandable concerns with stemming the federalization of common law tort actions, see Baker v. McCollan, 443 U.S. 137, 99 S.Ct. 2689, 61 L.Ed.2d 433 (1979), must not overcome a court’s duty to safeguard legitimate constitutional rights.10 As Justice Harlan realized, “ ‘liberty’ is not a series of isolated points pricked out in terms of [the Bill of Rights] .... It is a rational continuum which, broadly speaking, includes a freedom from all substantial arbitrary impositions and purposeless restraints.” Poe v. Ullman, 367 U.S. 497, 543, 81 S.Ct. 1752, 1776, 6 L.Ed.2d 989 (1961) (dissenting opinion).
Once a protected interest is found to exist, the proper level of judicial scrutiny is ascertained by the nature of that interest. A court must not be overquick to equate the scope of the right to protection or treatment for the involuntarily confined retarded with the already articulated scope of such rights for the criminally incarcerated.11 Nor are analogies to state or common law precedents controlling — it is federal law that answers the question of what process is due under the Constitution.12
The confinement of an individual to an institution for either the mentally ill or mentally retarded entails a “massive curtailment of liberty.” Humphrey v. Cady, 405 U.S. 504, 509, 92 S.Ct. 1048, 1052, 31 L.Ed.2d 394 (1972). In consequence it is circumscribed by due process protections. Addington v. Texas, 441 U.S. 418, at 425, 99 S.Ct., at 1809. And once inside the institution an individual’s liberty interest is not summarily extinguished.13 Rather, those aspects of personal autonomy recognized [158]*158from the time of Blackstone — the power of locomotion without restraint and the right to personal security14 — as well as the right to freedom from punishment, require continued respect. These fundamental liberties may be legitimately encroached upon only when justified by an overriding,15 non-punitive state interest related to the reasons for confinement.
Courts have reached a general consensus on three legitimate state justifications for the confinement of the mentally ill and mentally retarded. These rationales have evolved historically from (1) the protection of society from individuals who constitute a danger, a concept rooted in the state’s police power; to (2) the protection of individuals unable to care for themselves or prone to self-destructive acts, based on police power and parens patriae rationales; and finally to (3) rehabilitation — often limited to habilitation in the case of the mentally retarded — also an exercise of the state’s parens patriae authority.16 See Addington v. Texas, 441 U.S. 418, at 426, 99 S.Ct. 1804, 1809, 60 L.Ed.2d 323, O’Connor v. Donaldson, 422 U.S. 563, 573-74, 95 S.Ct. 2486, 2493-94, 45 L.Ed.2d 396 (1974).
Noticeably lacking, and logically inapplicable to the mentally retarded, are the traditional deterrence and retribution underpinnings of the criminal system.17 Obviously, the state has no right to punish an innocent individual, and the concept of deterrence has a minimal effect on a severely retarded person, such as the plaintiff here. In seeking to explain claimed infringements of fundamental liberty interests, the state is limited to protection and treatment rationales of a compelling or substantial nature. Involuntary commitment in the civil context, then, quite clearly implicates a constitutional right to treatment and protection.18 Alternatively, if a claimed post-commitment abridgement does [159]*159not reach the status of a gross deprivation or squarely cut across constitutionally protected liberty interests, but only tangentially implicates such an important interest, a mutual accommodation between institutional objectives and constitutional provisions is needed. This is so since the very nature of an institution requires some limitation on the retained rights of those who are confined. Cf. Wolff v. McDonnell, 418 U.S. at 556, 94 S.Ct. at 2974. In such instances, security concerns, fiscal constraints and administrative necessities may be adduced to demonstrate that a claimed encroachment is necessary to a facility’s internal operations.19
III.
In the present case, Romeo’s complaints may be appropriately conceptualized as (1) a right to be free from undue bodily restraint; (2) a right to personal security and protection; and (3) a right to adequate treatment. The first two are undiluted legal concerns, relating to protected liberty interests; as such, they are entitled to heightened judicial scrutiny. The third entails mixed questions of law and medical judgment, and thus requires a more flexible standard of judicial review and suitable deference to informed medical opinion.
The basis of Romeo’s first claim, that he was unduly shackled,20 is clearly inimical to the right of an unconvicted citizen to be free from punishment.21 Even though shackling may not be punishment per se, it raises a presumption of a punitive sanction.22 It squarely collides with a traditional liberty interest in freedom from bodily restraint.23 A valid involuntary commitment ex necessitate extinguishes a retarded person’s right to freedom from confinement. Nevertheless, a residuum of liberty remains which is entitled to due process protection. In Vitek v. Jones, which dealt with the transfer of a prisoner from a prison to a mental hospital, the Supreme Court found that an involuntary commitment to a [160]*160mental hospital is “qualitatively different from the punishment characteristically suffered by a person convicted of crime.” 445 U.S. 480, 499, 100 S.Ct. 1254, 1266, 63 L.Ed.2d 552 (March 25, 1980). Despite preexisting confinement, a substantial, additional loss of liberty occurred, for which the Court required observance of due process safeguards. Similarly, in the situation before us, shackling is not normally within the range of conditions of confinement contemplated in habilitative institutionalization.24 Neither in Vitek nor in the case at hand do the asserted privations inhere in the original rationales for confinement. Because of the fundamental right at issue here, as well as the substantial risk of error25 and the possibility of significant harm, the proper judicial posture is one of careful scrutiny.26
Plaintiff requested that his shackling claim be analyzed under the rubric of a “right to treatment under the least restrictive conditions consistent with the purpose of the commitment.” In this regard, he submitted the following charge:
Plaintiff contends that he was shackled to his bed or chair for long periods of time each day after he filed this lawsuit. If you find that he could have been provided treatment under less restrictive conditions than those imposed on him, then you must find that his constitutional rights were violated.
The court, however, gave the following instruction:
In order to prove his case the plaintiff must show acts or omissions sufficiently harmful to evidence a deliberate indifference to the serious medical needs of the resident. It is only such indifference that can offend the standards of decency required by the 8th Amendment. App. 2-236a — 2-237a.
We have already recorded our disapproval of the adoption of the Eighth Amendment standard in the mental retardation area. However, we cannot assent as the concurrence suggests, to an analysis which scrutinizes shackling and a right to treatment by a standard that is essentially the same. The Pennsylvania statute generally prohibits such shackling practices, see fn. 21, and similarly, mental retardation professionals have relegated the use of physical restraints to the closets of an earlier age. Logically, Romeo’s shackling claim centers on a liberty interest: a right to be free from bodily restraint.
The trial judge, therefore, should instruct the jury that such shackling may be justified only by a compelling necessity, i. e., that the shackling was essential to protect the patient or to treat him. It [161]*161should be explained that, except in emergency situations, inadequate resources or administrative rationales offer an insufficient basis for intrusions of this kind on a fundamental liberty interest. As the courts have repeatedly proclaimed, “Humane considerations and constitutional requirements are not, in this 'day, to be measured or limited by dollar considerations.” Jackson v. Bishop, 404 F.2d 571, 580 (8th Cir. 1968) (Blackmun, J.), quoted in Rozecki v. Gaughan, 459 F.2d 6, 8 (1st Cir. 1972) quoted in Wyatt v. Aderholt, 503 F.2d 1305, 1315 (5th Cir. 1974). Plaintiff is also entitled to a charge, in the alternative, that to absolve the defendants from liability on the shackling claim it would be necessary to find that shackling was the least restrictive method of dealing with the patient,27 in light of his problems and the surrounding environment. A “least restrictive” charge will not only insure that compelling treatment explanations, as opposed to fiscal concerns or staff convenience, were the basis for the shackling, but also that the institution considered and rejected alternative methods of restraining the resident, if some restraint indeed was required.28
A comparison with the result that might be obtained by employing the unitary standard proposed by the concurrence is apposite here. Under the standard advanced by the concurrence, the jury would be charged that shackling is permissible so long as there was not “such a substantial departure from accepted professional judgment, practice, or standards as to demonstrate that the defendants did not base their conduct on a professional judgment.” Arguably, such an instruction assumes that physical restraint for the convenience of the staff would constitute a substantial departure from accepted professional judgment. Yet it is not logically evident that concerns of staff convenience are the sort of departures from medical judgment that rise to the level of being a sham or otherwise illegitimate, as defined in the concurring opinion. More fundamentally, although the standard proposed by the concurrence would probably prevent use of shackling as punishment,29 it would not preclude its use as a substitute for more effective treatment programs. Thus such a standard would fail to give adequate weight to the resident’s substantial interest in freedom from bodily restraint. In addition, it would conflict with the thrust of the state’s interest as proclaimed in § 4422 of the Mental Health and Mental Retardation Act, in prohibiting the [162]*162use of mechanical restraints except in limited situations.
Our holding that the district court erred with respect to the jury instruction for the shackling claim, and our establishment of a compelling necessity standard for review of such troubling interferences with bodily freedom, necessarily require an additional finding of error in the district court’s exclusion of relevant expert testimony. Under the compelling necessity or least restrictive standards of proof, both sides are, of course, permitted to adduce evidence. Although defendants must justify the shackling as the least restrictive means of handling or protecting the individual, the plaintiff may produce evidence, for example, that restraints were utilized largely because of convenience to the staff. Consequently, Dr. Foxx’s proffered testimony regarding the inappropriate reasons and counterproductive results connected with the restraint of Romeo, was improperly excluded by the trial court.
IV.
From Colonial times to the present day, the concept of liberty has embraced the “right to be free from and to obtain judicial relief for unjustified intrusions on personal security.” Ingraham v. Wright, 430 U.S. 651, 673, 97 S.Ct. 1401, 1413, 51 L.Ed.2d 711 (1977). Plaintiff’s second claim, the right to protection from attack, undeniably falls within the compass of this right. The record discloses that while confined at Pennhurst Romeo was injured on over seventy occasions. Some of these injuries were self-inflicted, some resulted from attacks by fellow residents, and some may even have been by the staff. The evidence also suggests that the defendants knew, or had reason to know, of some or all of the injuries suffered by the plaintiff. It would be anomalous to find that the right to a secure environment, which federal courts have often intervened to protect in the context of penal institutions, did not extend to facilities for the mentally retarded.30
The scope and nature of the right of the plaintiff to protection from attack is also capable of judicial demarcation. Both the individual’s right to personal security and the state’s interest in providing care converge to support a right to protection from attack. The state cannot simply confine a person, without more, because he may be a danger to himself or to third parties.31 Only after the commission of a discrete criminal act and conviction in accordance with procedural protections is incarceration without more warranted. Consequently, in order to survive constitutional scrutiny, involuntary commitment of a mentally retarded person must combine an interest in insulating society from dangerous behavior with a promise, either express or by implication, to care for and to treat the individual.32 Alternatively, the commitment of a retarded person for treatment purposes or because he is unable to care for himself, necessarily entails the provision of care and protection. The parens patriae power to provide care and protec-[163]*163turn is thus inextricably bound up m the involuntary commitment of the retarded regardless of the original rationale for the confinement.
Further, in Romeo’s case, commitment was pursuant to Penn.Stat.Ann. tit. 50, Mental Health and Mental Retardation Act of 1966. The state, in confining Romeo, represented that it was “willing and able” to care for him.33 The statute provides an entitlement to protection34 which, like other state-created entitlements, is guarded by constitutionally acceptable procedures. The right to protection is not activated by an isolated mishap, or called into question by each bruise that a patient may suffer. But a pattern of attacks, injuries or violent behavior such as we have here would create a claim to such a right. While no one is guaranteed an injury-proof life, Romeo, as an involuntarily committed resident of Pennhurst, had a right to humane care and protection, bottomed both on the Pennsylvania statute and the Constitution.
Institutions for the mentally retarded are rarely “open” facilities. Those involuntarily confined are not free to return home, and indeed, many are bereft of any support by family and friends.35 This absence of openness or significant community surveillance and oversight underscores the need for the courts to discharge their traditional function of safeguarding constitutional rights36
Therefore, with respect to the protection claim, we conclude that the trial court erred in its charge. It instructed the jury that:
Under the 14th ... Amendment, state officials at a state mental hospital have a duty to protect involuntarily committed residents from repeated attacks by other patients and staff. Plaintiff ... contends that these defendants violated such a duty to protect him because they were aware of such attacks and failed to take such reasonable steps as [were] required to protect him. If you find that the defendants were deliberately indifferent to the medical and psychological needs of [the plaintiff], then you may find that plaintiff’s ... 14th Amendment rights were violated.
To find for the plaintiff you need not find that the defendants personally participated in any attack upon the plaintiff. If you find that the defendants were aware of repeated attacks upon plaintiff and failed within their sphere of authority to take reasonable steps to protect the plaintiff, then you may find that the defendants are liable for a violation of the plaintiff’s constitutional rights, (emphasis supplied)
As we see it, the jury should be informed that the plaintiff has a right to have his physical safety protected. The [164]*164plaintiff sought an instruction that defendants had an obligation to “take reasonable steps to protect plaintiff.” Chief Judge Seitz maintains that such a charge is virtually indistinguishable from a state malpractice standard. Infra at 177. However, analysis of this particular claim for constitutional purposes would proceed as follows: because this is a fundamental interest — which conflates plaintiffs right to personal security with defendants’ duty to protect — if the defendants failed to provide for Romeo’s personal security, such failure can be justified, in a § 1983 case, only by substantial necessity. Substantial necessity is more appropriate than the compelling necessity standard employed in connection with the shackling claim, for it enables a court and jury to distinguish between isolated incidents and inadvertent accidents, on the one hand, and persistent disregard of patients’ needs, on the other.37 If the defendants disregarded plaintiff’s injuries or failed to take steps to protect plaintiff then they should be liable unless they can offer explanations based on important state interests.38 However, the least restrictive charge, which is applicable to the shackling claim, is a less meaningful analytic tool in the protection setting because of the very existence of a right to personal security and a duty on the part of the state to protect. We cannot assume that all patients desire and are capable of dealing with the freedoms provided by least restrictive treatment. Moreover, inherent inconsistencies arise in the use of such a concept in the protection area. The least restrictive treatment, which might be the least confining, might provide insufficient protection and care for a particular resident’s wants and needs.
In view of the stance we have adopted regarding the plaintiff’s right to personal security and protection from attack, we hold that it was error for the district court to exclude the testimony of Dr. Foxx and Dr. Grover concerning the availability of treatment programs which would minimize the aggressive behavior and attacks that were unnecessarily prevalent at Pennhurst. Such evidence is relevant in enabling the jury to resolve whether the defendants were properly attending to, or overlooking, the right of the plaintiff to protection from attack.39
V.
Plaintiff’s third complaint turns essentially on a claim of inadequate treatment and a right to treatment in the least restrictive manner. As previously ob[165]*165served, unlike a right to freedom from bodily restraint or to personal security, treatment does not present a purely legal issue. See p. 159 supra. Questions of a court’s relative competence concerning medical decisions and respect for medical judgment, as well as concerns of comity with the legislative and executive branches, place this claim in a different perspective. The move from preventing degrading impositions on human dignity, such as shackling and exposing a resident to continuous attacks, to requiring treatment consonant with individual needs, transfers the court to a subjective realm of decision making. Nevertheless, appropriate deference to medical expertise does not diminish the judicial duty to safeguard liberty interests implicated in treatment decisions.
The right to treatment — or habilitation in the case of the mentally retarded40—arises when an individual is involuntarily committed, regardless of whether parens patriae or police power grounds provide the major premise for the confinement. See pp. 158, 162 supra. A court performs two functions with respect to such a right: it requires that treatment be provided to those who require and are willing to accept it, and it places limits on the state’s power to impose such treatment on those who do not desire it. A right to treatment does not create a corresponding duty to submit to any treatment whatsoever; such a simple equation would sanction unacceptable invasions of personal autonomy.41
At one end of the spectrum, an absolute failure to treat, when treatment is the reason for commitment, raises clear and serious constitutional problems. As the Court noted in O’Connor v. Donaldson, 422 U.S. 563, 95 S.Ct. 2486, 45 L.Ed.2d 396 (1974), “where ‘treatment’ is the sole asserted ground for depriving a person of liberty, it is plainly unacceptable to suggest that courts are powerless to determine whether the asserted ground is present.” Id. at 574 n.10, 95 S.Ct. at 2493 n.10. In such instances, it is the court’s duty to insist on appropriate treatment or that the plaintiff be released.42 At the other end of the spec[166]*166trum is the judicial role in dealing with involuntary treatment which occasions severe intrusions on individual dignity. Non-reversible physical operations, such as a vasectomy, or permanent physical alterations by surgical intervention, such as a prefron-tal lobotomy, or the administration of powerful antipsychotic drugs may well constitute fundamental liberty violations.43 Like shackling, it may be that they should be subject to close court scrutiny.44 Similarly, the reasons which commend the use of least restrictive analysis with respect to shackling — existence of a judicially assessable, discrete act, which entails a significant loss of individual liberty — may be present in the context of such invasive, involuntary procedures. Since some of these procedures may not be present in the case at hand after it is remanded, we do not address the subject in any detail except to note the possibility of its existence. But, whenever unalterable interferences with bodily integrity. place deprivations of liberty in issue, the law and not medicine is the ultimate decision-maker.
Once analysis transcends the groundlevel question of treatment vel non, however, and settles in the middle ground, legal questions of unconstitutional liberty deprivations begin to merge with medical judgments regarding the appropriateness of the regimen. Inasmuch as we are remanding, inter alia, because the district court’s improper employment of Eighth Amendment scrutiny resulted in the exclusion of the plaintiff’s proffered medical testimony, it is uncertain how the record will develop at trial. However the summaries of medical testimony, offered as proof out of the hearing of the jury, suggest that the trial court may need guidance in a range of situations, involving problems of both intrusive and inadequate treatment. We therefore find it in order to delineate the legal standards and jury, charges applicable in the treatment realm.
Where the issue turns on which of two or more major treatment approaches is to be adopted, a “least intrusive” analysis may well be appropriate. If the staff decides upon a course of treatment which offers some promise of effectiveness without undue risk to the patient, such decision may well come within the ambit of least intrusive means. If the likelihood of serious side effects does exist, however, and substantial improvement is not reasonably expectable, then such judgments might well present a basis for finding that the course of treatment was not the least intrusive under the circumstances.45 In making constitutional judgments in such situations, the court must necessarily depend in large measure on medical evidence. Once the least intrusive regime has been selected, therefore, the application of a constitutional standard of “least intrusive alternative” to [167]*167continuing treatment programs, which often involve qualitative medical determinations subject to daily, possibly hourly changes, would prove unworkable.46 The judiciary is not in a particularly advantageous position to determine which of two medications is less intrusive, nor especially competent in assessing present therapeutic benefits versus long-term consequences and side effects for each administration of a drug. Further, least restrictive assumes a direct correlation between restrictiveness and effectiveness, a presumption which can not be medically corroborated in every instance.47
Unfortunately, in attempting to craft the appropriate standard to apply to a charge of inadequacy of treatment the courts find themselves in a Scylla and Charybdis situation. On the one hand, the Supreme Court has cautioned that,
Although we acknowledge the fallibility of medical and psychiatric diagnosis, (citation omitted) we do not accept the notion that the shortcomings of specialists can always be avoided by shifting the decision from a trained specialist using the traditional tools of medical science to an untrained judge or administrative hearing officer.... the supposed protections of an adversary proceeding to determine the appropriateness of medical decisions for the commitment and treatment of mental and emotional illness may well be more illusory than real.
Parham v. J.R., 442 U.S. 584, 609, 99 S.Ct. 2493, (1979). On the other hand, the Supreme Court has noted that “The medical nature of the inquiry, however, does not justify dispensing with due process requirements.” Vitek v. Jones, 445 U.S. 480, 499, 100 S.Ct. 1254, 1266, 63 L.Ed.2d 552 (March 25, 1980), citing Addington v. Texas, 441 U.S. at 430, 99 S.Ct. at 1811. Although both these statements refer to initial commitment procedures for the mentally ill,48 their logic appears equally applicable to judicial review of treatment decisions within institutions for the mentally retarded.
[168]*168In the present case Romeo was confined pursuant to § 406 of the Pennsylvania Mental Health & Mental Retardation Act of 1966, which provides that commitment is for “care and treatment.”49 By basing Romeo’s deprivation of liberty at least partially upon a promise of treatment, the state ineluctably has committed the community’s resources to providing minimal treatment. While Romeo has an entitlement to some treatment,50 the evidence in the record, although somewhat contradictory, suggests not so much a total failure to treat as an inadequacy of treatment.51
Given this situation it would be unrealistic for us to ignore that courts by and large are not in as advantageous a position as the personnel at applicable institutions to make decisions relating to day-to-day or hour-to-hour treatment.52 Moreover, the evaluation of standards of adequacy and suitability in the psychiatric field is extremely difficult even for trained personnel, and certainly in the judicial context. Questions in this field, as the Court in Addington noted, often require not only a resolution of complicated factual issues, they turn on the very meaning of those facts — a meaning that must be interpreted by expert psychiatrists and psychologists. 441 U.S. at 429, 99 S.Ct. at 1811.53 And unquestionably, the gap between available resources and those needed for ideal treatment programs is, unfortunately, considerable. Once minimum treatment needs are satisfied, courts should be cautious in requiring legislatures to allocate resources in a way that may well be more desirable, but not constitutionally mandated.54
Consequently, with respect to the claim regarding adequacy of treatment, we agree neither with the plaintiff, that he has a right, insofar as day-to-day decisions are concerned, to judicial review based on a constitutional standard of least intrusive,55 [169]*169nor with the defendants that only deliberate indifference to the medical and psychological needs of Romeo constituted a violation of his right to treatment.56 It should be made clear to the jury that for the plaintiff to prevail it is necessary to find that an individual involuntarily confined in a facility for the mentally retarded did not receive a form of treatment that is regarded as acceptable for him in light of present medical or other scientific knowledge.57 The state should be permitted to adduce evidence of security concerns, administrative necessities and fiscal constraints in the course of explaining its adoption of the challenged program. Thus, if defendants can demonstrate a coherent relationship between a particular treatment program and a resident’s needs, they would not be liable.58
[170]*170The standard articulated here may appear, at first blush, to differ minimally from that propounded by the concurrence. However, the concurring opinion’s concern with distinguishing the constitutional prohibition against a “substantial departure from accepted professional judgment” from a malpractice standard might lead to an approval of all conduct that is “not a sham or otherwise illegitimate.” Infra at 181. We do not believe that such a test can adequately protect a retarded person’s acknowledged constitutional right to treatment or habilitation.59 Nor do we believe that the judiciary lacks the tools to ascertain whether the constitutional minimum of medical acceptability proposed here is being fulfilled. While earlier courts struggled to weigh conflicting opinions and contending medical theories regarding severely retarded persons, Congress has recently facilitated a court’s ability to determine whether a coherent relationship between a treatment program and a resident’s needs exists. The enactment of the Developmentally Disabled Assistance and Bill of Rights Act of 1975 provides guidelines, albeit not constitutionally binding, which enhance rational court review.
Should the plaintiff’s constitutional claims fail, the recent case of State of Maine, et al. v. Thiboutot, 448 U.S. 1, 12, 100 S.Ct. 2502, 2508, 65 L.Ed.2d 555 (1980), may provide a remedy under 42 U.S.C. § 1983 for statutory claims grounded in the Developmentally Disabled Assistance and Bill of Rights Act. The potential availability of such a route for redressing infringements or deprivations of rights established by federal statutes further suggests that we are dealing not with matters of common law malpractice, but with fundamental interests of national import.
VII.
Although the varying standards set forth in this opinion may occasion concern that the issues presented to the jury might appear overly complex, we believe they are meaningful and carefully distinguish varying factual situations. It cannot be gainsaid that the act of shackling a resident is substantially different from the implementation of daily treatment decisions. Likewise, a failure to protect an individual from a sustained series of attacks cannot properly be equated with a failure to choose a particular technique for habilitation. Accordingly, special effort should be employed to ensure that juries can intelligently grasp the differences. Such an effort is not completely novel in the law. It takes place, for example, in areas of negligence law, immunity law, and admiralty law. We do not, therefore, share the concern expressed by the concurring opinion that district court judges or juries will be unable to understand these distinctions. Moreover, it is reasonable to expect that future plaintiffs will have grounds for raising only one or two of the claims analyzed here, thus further simplifying the difficult task. In any event, it would be a disservice to an injured person who claims to have been abused during a period of involuntary institutionalization to lump indiscriminately a variety of constitutional violations for the sake of beguiling simplicity. Such oversimplification, so handy in political debate, often lacks the precision necessary for resolving complicated legal questions.
Inasmuch as it is still unclear how the evidence will emerge at the retrial, we have set forth in an appendix what may provide a beginning point for a set of jury instructions in a matter of this type.60 Of course [171]*171the specific instructions submitted to the jury must be carefully structured to reflect the actual record that is developed on remand.
VIII.
Because we have already ruled that a new trial is required, we need not decide whether the other errors raised by plaintiff concerning the method in which the trial was conducted are themselves grounds for a new trial. However, we believe that a comment on the trial court’s approval of dual representation for the defendants is in order. At a final pretrial conference, the attorney who had appeared for all the defendants, as a result of an insurance agreement, requested that both he and the deputy attorney general, who represented the defendants as state employees, be permitted to act as counsel during trial. The district court ruled in favor of this joint participation. In order to explain the presence of both attorneys, the court suggested that insurance counsel identify himself as the attorney for Dr. Youngberg, and that the deputy attorney general identify himself as counsel for defendants Matthew and Conley. The jury was só advised, and heard two sets of opening and closing statements, as well as double cross-examinations, although no separate legal interests or conflicts among defendants were asserted or surfaced.
On remand, the district court should make some ruling on this issue. If it determines that dual representation is permissible, it should set forth supporting reasons.61 Moreover, the practice of permitting counsel to make deliberate misstatements to the jury, even for the purpose of concealing the existence of liability insurance coverage, is of dubious propriety and should not be repeated.
IX.
In order to appreciate the full problem posed by this case, it is important to note that the Supreme Court has recognized a common law of qualified immunity protecting officials and employees from civil liability for acts performed in the discharge of duties imposed upon them. Such immunity is available even when constitutional rights have been transgressed, if the official or employee was not aware, or had no reason to be aware, of such rights. As the Supreme Court explained in Wood v. Strickland, liability for damages for every action which is found subsequently to have been violative of a person’s constitutional rights and to have caused injury would unfairly impose upon administrators the burden of mistakes made in good faith in the course of exercising discretion within the scope of official duties. 420 U.S. 308 at 319, 95 S.Ct. 992 at 999, 43 L.Ed.2d 214 (1975).
Because of the evolving nature of the rights in issue here, it may well be that the defendants did not know of them or had no reason to know of them — governmental officials are not “charged with predicting the future course of constitutional law.” Pierson v. Ray, 386 U.S. 547, 557, 87 S.Ct. 1213, 1219, 18 L.Ed.2d 288 (1967). Institutional administrators are entitled to rely on traditional sources for the factual information incorporated in their policy decisions, and when faced with behavior causing or threatening disruption, have an obvious need for prompt action and judgments, which can only be based on existing knowledge. See Scheuer v. Rhodes, 416 U.S. 232, 246, 94 S.Ct. 1683, 1691, 40 L.Ed.2d 90 (1974). Accordingly, when this matter is remanded for a new trial, the trial judge should instruct the jury regarding the possi[172]*172bility of immunity62 with the caveat that defendants’ reasonable belief is to be judged at the time their actions were taken. The jury should further be charged that the defendants are not responsible for unforeseeable developments in the law.
X.
The deplorable conditions at Pennhurst and the manifold problems and anguish that those conditions spawned have been addressed in Halderman v. Pennhurst. The present litigation deals with the more discrete problems facing individual patients and their relationships with officials and employees of the institution. More particularly, it relates to the constitutional rights possessed by such citizens and the responsibilities and duties of officials and employees who are claimed to violate such rights.
Unfortunately, these constitutional rights have not always been clearly perceived, and even when recognized the description of such rights, their articulation, and their application to particular factual patterns has only slowly emerged. Even today, the process is still in its early stages.
The difficulty of the task — and it frequently is difficult to describe with exactitude the contours of developing constitutional protections — is further complicated because the applicable medical disciplines are themselves still in their formative period, and because the resources available to the states are so limited. Nonetheless, where valid rights of citizens are at stake, the courts may not shirk the task of seeking to spell out the elements and details of such rights as carefully as possible.
To the extent that in the past we may have invoked inapplicable analogies, we should be forthright enough to admit the error and to seek to rectify it. To the extent that utilization of other concepts, though appealing, is found to be impractical, we should continue the quest for standards that are realistic and reflective of the changes that are still taking place in psychiatry, psychology, sociology and other related fields that so greatly affect the problems of the retarded.
At the same time we must be cautious in establishing rules that would visit serious financial liabilities on administrators, who, when they performed the acts in question, were not aware of the new standards of rights and responsibilities subsequently formulated by the courts or the new scientific advances that have been achieved to minister to persons who are mentally retarded.
XI.
The judgment of the district court will be vacated, and the case remanded for a new trial.
APPENDIX
I. SHACKLING
If you find that the plaintiff was shackled against his will, and defendants knew or had reason to know of such conduct, you may find the defendants liable unless they can offer compelling reasons for this action. If the defendants satisfactorily explain that it was necessary to shackle the plaintiff for his own protection or for treatment purposes, then they may not be liable. However, it must be demonstrated that the shackling was the least restrictive means of handling the resident — that other, less severe measures had been tried or considered and found unworkable. Only compelling reasons relating to the treatment or the protection of the resident are permissible justifications for shackling.
[173]*173II. PROTECTION FROM ATTACKS
If you find that the plaintiff was harmed by a series of attacks, and the defendants knew or had reason to know of them, then you may hold the defendants liable. If the defendants knew or had reason to know of these attacks, then only if they provide substantial reasons which explain that the attacks occurred despite their attention will they be deemed to have fulfilled their duty to care for and to protect the plaintiff. Substantial explanations have to do with promoting the treatment or protection of the plaintiff. For example, if the staff considered it important, for therapeutic purposes, to have the resident mingling with others instead of confined to an isolated cell, even though some risk of injury existed, you may consider that to be a substantial explanation. But overcrowded conditions or inadequate staffing patterns may not justify the injuries.
III. ADEQUATE TREATMENT
A. If you find that the plaintiff was involuntarily committed for treatment, and no treatment was administered, and no compelling explanation for the lack of treatment was offered, you may hold the defendants liable.
B. If you find that the plaintiff has received some treatment, you must then determine whether the treatment is regard-' ed as acceptable in the light of present medical or other scientific knowledge. If you find that it is not acceptable, you may find for the plaintiff. In addition, if the evidence does not demonstrate that there is a relationship between the treatment administered and the plaintiff’s needs, even if the treatment is arguably regarded as acceptable in other situations, then you may find for the plaintiff. In deciding upon the adequacy of the treatment program adopted you may consider the defendants’ explanations regarding security concerns, administrative necessities and fiscal constraints.
C. If you find that a selection of a mode of treatment subjected the plaintiff to significant deprivations of liberty, then you must go on and determine whether that decision provided for the least intrusive treatment available under the circumstances. If the defendants considered other alternatives and ascertained that the program adopted was the least intrusive available, then you should find the defendants not liable.