Tex. Health & Safety Code § 483.021 : HEALTH AND SAFETY CODE — FOOD, DRUGS, ALCOHOL, AND HAZARDOUS SUBSTANCES — SUBSTANCE ABUSE REGULATION AND CRIMES — DANGEROUS DRUGS — DUTIES OF PHARMACISTS, PRACTITIONERS, AND OTHER PERSONS — Determination By Pharmacist on Request to Dispense Drug TEXT PDF (a) A pharmacist who is requested to dispense a dangerous drug under a prescription issued by a practitioner shall determine, in the exercise of the pharmacist's professional judgment, that the prescription is a valid prescription. A pharmacist may not dispense a dangerous drug if the pharmacist knows or should have known that the prescription was issued without a valid patient-practitioner relationship. (b) A pharmacist who is requested to dispense a dangerous drug under a prescription issued by a therapeutic optometrist shall determine, in the exercise of the pharmacist's professional judgment, whether the prescription is for a dangerous drug that a therapeutic optometrist is authorized to prescribe under Section 351.358, Occupations Code. Tex. Health and Safety Code § 483.021 Amended By Acts 2001, 77th Leg., ch. 1254, Sec. 12, eff. 9/1/2001 Amended By Acts 2001, 77th Leg., ch. 1420, Sec. 14.796, eff. 9/1/2001. Amended by Acts 1991, 72nd Leg., ch. 588, Sec. 27, eff. 9/1/1991 Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. 9/1/1989.