NRS 639.2392: Controlled substance or dangerous drug: Records.

1. A record of each refill of any prescription for a controlled substance or dangerous drug or any authorization to refill such a prescription must be kept:

(a) On the back of the original prescription;

(b) In a bound book or separate file; or

(c) In an electronic record that is readily retrievable.

2. The record must include:

(a) The date of each refill or authorization;

(b) The number of dosage units; and

(c) The signature or initials of the pharmacist who refilled the prescription or obtained the authorization to refill.