Nonproprietary drugs are considered to be drugs which carry the following, or similarly worded, legend as required by the Federal Food, Drug and Cosmetic Act (21 U.S.C.A. § 301 et seq.):
28 Pa. Code § 25.81
This section cited in 28 Pa. Code § 551.3 (relating to definitions); 49 Pa. Code §18.6a (relating to prescribing, dispensing and administering drugs); and 49 Pa. Code §21.284a (relating to prescribing and dispensing drugs).