Promethazine HCl 25mg/mL, 50mg/mL; sol for IM or IV inj; contains sulfites. Sulfite sensitivity. CNS depression. Impaired respiratory function (eg, COPD, sleep apnea). Narrow-angle glaucoma. GI or ...

Promethazine HCl 12.5mg+, 25mg+, 50mg; tabs; +scored. Motion sickness: 25mg 30–60mins before travel; may repeat in 8–12hrs; maintenance 25mg twice daily. Perioperative nausea & vomiting: 25mg ...

For direct comparison, mean plasma promethazine concentrations ... than with the 25-mg treatments (2 subjects [6%] for each treatment). Headache, nausea, vomiting, dizziness, and asthenia were ...

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 ...