28 Pa. Code § 25.94
Drugs which at the time of their dispensing have full potency for less than one year, as determined by the expiration date placed on the original label by the manufacturer, may only be dispensed by a practitioner with a label that indicates said expiration date. The label should include the statement: "Do not use after (manufacturer's expiration date)" or similar wording.
28 Pa. Code § 25.94
This section cited in 28 Pa. Code § 25.95 (relating to mandatory compliances); 28 Pa. Code § 551.3 (relating to definitions); 49 Pa. Code § 18.6a (relating to prescribing, dispensing and administering drugs); 49 Pa. Code § 18.158 (relating to prescribing and dispensing drugs); 49 Pa. Code § 21.284a (relating to prescribing and dispensing drugs); 49 Pa. Code § 25.177 (relating to prescribing and dispensing drugs, pharmaceutical aids and devices); and 49 Pa. Code § 43b.7 (relating to schedule of civil penalties-pharmacists and pharmacies.).