Get detailed information on Promethazine, including pronunciation ... Allergy- The average oral dose is 25 mg taken before retiring; however, 12.5 mg may be taken before meals and on retiring ...
At intervals of five to nine days, healthy volunteers were given two 12.5-mg promethazine rectal suppositories, one 25-mg suppository, one 50-mg suppository, or 50 mg (10 mL) of promethazine oral ...