OAR 855-139-0320. Prescription: Expiration

This section of rule addresses the expiration date of the prescription and not the expiration date of the drug. (1) After one year from date of issue, a prescription for a non-controlled substance becomes invalid and must be re-authorized by the prescriber. (2) When used alone as a prescription refill designation the abbreviation, "PRN" for a non-controlled substance means that the medication can be refilled in proper context for a period of one year. (a) When this abbreviation is used alone as a means to authorize refills for a controlled substance, the medication can be refilled in proper context for a period of six months or five refills, whichever comes first. (b) When this abbreviation is used in conjunction with a definite time period, or a specific number of refills, the non-controlled medication can be refilled in proper context for a period not to exceed one year.