Not Medical Advice: White, round-shape pill with ZC 01 imprint has been identified as Promethazine hydrochloride 12.5 mg.
Promethazine belongs to the drug classes antihistamines, phenothiazine antiemetics. It works by changing the actions of chemicals in your brain. It also acts as an antihistamine. It blocks the effects of the naturally occurring chemical histamine in your body.
Promethazine is used in the treatment of opiate adjunct, sedation, light sedation, nausea/vomiting, allergic reactions and more.