Texas Health and Safety Code - HEALTH & SAFETY § 442A.054. Mail-back Program Requirements

(a) A participating pharmacy that provides a collection receptacle for the safe disposal of prescription drugs may, under limited circumstances as the pharmacy determines necessary, provide at the time the pharmacy dispenses a controlled substance prescription drug to the ultimate user a vendor's mail-back envelope, at no cost to the ultimate user. The mail-back envelope must:

(b) A participating pharmacy may provide not more than 250 mail-back envelopes during the duration of the pilot program to encourage use of the pharmacy's collection receptacle.