Pennwalt Corp. v. Zenith Laboratories, Inc.

472 F. Supp. 413, 203 U.S.P.Q. (BNA) 52, 1979 U.S. Dist. LEXIS 11560
CourtDistrict Court, E.D. Michigan
DecidedJune 21, 1979
DocketCiv. A. 8-71997
StatusPublished
Cited by33 cases

This text of 472 F. Supp. 413 (Pennwalt Corp. v. Zenith Laboratories, Inc.) is published on Counsel Stack Legal Research, covering District Court, E.D. Michigan primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Pennwalt Corp. v. Zenith Laboratories, Inc., 472 F. Supp. 413, 203 U.S.P.Q. (BNA) 52, 1979 U.S. Dist. LEXIS 11560 (E.D. Mich. 1979).

Opinion

MEMORANDUM OPINION AND ORDER

JOINER, District Judge.

This is an unfair competition and trademark infringement case. Plaintiff, Pennwalt Corporation, manufactures and sells an anorectic drug with the trademark name Ionamin. Defendant, Zenith Laboratories, Inc., manufactures and sells an anorectic drug called Phentermine Hydrochloride. 1 Pennwalt seeks a preliminary injunction prohibiting the continued manufacture, sale, and distribution by Zenith of phentermine products in capsules of confusingly similar size, shape, and color to Ionamin and prohibiting any comparison of Phentermine Hydrochloride to Ionamin. Pennwalt has also moved to dismiss Zenith’s counterclaims which allege antitrust violations, interference with business relations, abuse of trademark registration and abuse of process. For reasons stated more fully herein, Pennwalt’s motion to preliminarily enjoin Zenith from selling Phentermine Hydrochloride is granted in the forms and to the particular consumers described in this opinion, and Pennwalt’s motion to dismiss Zenith’s counterclaims is granted.

PRELIMINARY INJUNCTION

The following findings of fact are based upon testimony and other evidence presented by the parties at the hearing conducted by this court on plaintiff’s motion for a preliminary injunction. Ionamin is Pennwalt’s registered trademark for a phentermine resin complex available by prescription only. Ionamin is sold in doses of 30 milligrams and 15 milligrams. Thirty milligram capsules are yellow in color and 15 milligram capsules are yellow and grey. The colors of yellow and yellow and grey were consciously selected by Pennwalt for the purpose of giving Ionamin a unique and distinctive appearance from the viewpoint of the patient. Both capsules are approximately % of an inch in length and Vis of an inch in diameter, with rounded ends. These colors,, shapes, and sizes have been used continuously from 1958 to the present. The *416 capsules also bear a small distinctive mark indicating they are a Pennwalt product as well as the National Drug Code Number 18-904.

During the time it has manufactured and sold Ionamin, Pennwalt has made extensive efforts to develop goodwill in its Ionamin products through carefully controlled production, distribution only to wholesale drug dealers and government hospitals, medical journal advertising, direct mail ads to physicians, displays at medical conventions, and a field sales force making face to face presentations to physicians. Much of the advertising and promotion has featured the colors of the Ionamin capsules.

Between 1961 and 1970, Pennwalt has expended between 1 million and 1.5 million dollars on these promotional efforts. Since 1971, the cost of promotion has exceeded two million dollars each year. As a result of these efforts, net sales of Ionamin have grown steadily from 1.5 million dollars in 1963 to 12.5 million dollars in 1976. Net sales dropped in 1977 to 10.8 million dollars and rose again to 12.1 million dollars in 1978.

An investigation of the 1977-78 drop in sales by Pennwalt disclosed the entry of a competitor in the market in 1976, an anorectic drug manufactured by Beecham. This drug is called Fastin and is composed of Phentermine Hydrochloride sold in 30 milligram blue and clear capsules. Pennwalt also discovered, however, that during 1977 and 1978 its decline in net sales of Ionamin was greater than the corresponding decline in prescriptions for Ionamin.

Since 1975, Zenith has manufactured and sold Phentermine Hydrochloride in capsules of the identical dosages, colors, size, and shape as Ionamin. The capsules of Phentermine Hydrochloride do not,' however, bear the distinctive Pennwalt mark which appears on the Ionamin capsules and, instead of 18-904, Phentermine Hydrochloride capsules display the National Drug Code Number 172. Zenith also manufactures and sells Phentermine Hydrochloride in blue and clear capsules similar to those manufactured and sold by Beecham. Zenith asserts that it intentionally puts its Phentermine Hydrochloride in capsules with colors corresponding to those used for Ionamin and Fastin so as to preserve any therapeutic effect the patient might derive from the color of the capsule by associating efficacy of the drug with appearance of the capsule.

At some time after it began to manufacture Phentermine Hydrochloride, Zenith published a catalogue of its products in which Phentermine Hydrochloride was listed. The introductory pages of this catalogue include the following statements:

PROFIT..... by reducing your dollars which are presently tied up in duplicate inventory unnecessarily..... with one complete quality line of Nationally recognized and accepted generic pharmaceuticals ..... ZENITH’S.
Recognizing the ever present need to cut your costs while still maintaining a complete line of quality pharmaceuticals has been Zenith’s main objective over the past eighteen years. Only recently with the widespread and ever increasing acceptance of quality generics by state and federal agencies has Zenith been recognized as one of the leading national pharmaceutical manufacturers in the country. Let ZENITH help your company towards greater growth with greater profits. QUALITY, EFFICACY, ELEGANCE plus PROFIT is ZENITH’S formula for success with our customers.

In the body of the catalogue, Zenith’s product “Phentermine 30 mg. ** CIV” is listed in a verticle column along with other timed disintegration capsules. In parenthesis underneath the product name appears the description “No. 3 Yellow Capsule.” Two other parallel columns on the same page as the column identifying the product “Phentermine 30 mg. ** CIV” describe it as “SIMILAR TO” “Ionamin” and indicate its “CATEGORY OR USE” to be an “Anorexic.”

Phentermine Hydrochloride and Ionamin, which is composed of a phentermine resin complex, both contain the same active ingredient, phentermine. “Phentermine” is the generic name for both drugs. However, *417 all the evidence received by this court indicates that Phentermine Hydrochloride is not the generic equivalent of Ionamin. The only testimony received on this difficult subject was to the effect that a strict definition of generic equivalence is chemical equivalence. Drug products are chemical equivalents according to the United States Food and Drug Administration and the Michigan State Board of Pharmacy if they contain the same active ingredients and are identical in strength, dosage form and route of administration. According to this definition, Phentermine Hydrochloride and Ionamin are not chemical equivalents. A 30 milligram capsule of Ionamin contains 30 milligrams of phentermine whereas a 30 milligram capsule of Phentermine Hydrochloride contains .only 24 milligrams of phentermine.

During the hearing it was also brought out that due to the chemical composition of Phentermine Hydrochloride as a highly soluble salt of phentermine all of the active ingredient is released for absorption into the blood stream upon ingestion. Timed release of the active ingredient can be achieved through the use of coatings on the capsule, however, the timing is subject to variation with such factors as the ph level of the patient’s gastro-intestinal fluids. Furthermore, the basic mechanism of release, dissolution, remains the same.

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Bluebook (online)
472 F. Supp. 413, 203 U.S.P.Q. (BNA) 52, 1979 U.S. Dist. LEXIS 11560, Counsel Stack Legal Research, https://law.counselstack.com/opinion/pennwalt-corp-v-zenith-laboratories-inc-mied-1979.