It is about equal to codeine in depressing the cough reflex. In therapeutic dosage dextromethorphan does not inhibit ciliary activity. Promethazine is an H 1 receptor blocking agent. In addition ...

Codeine phosphate 10mg, promethazine HCl 6.25mg ... acute febrile illness with productive cough, compromised respiratory function (eg, COPD, sleep apnea). Discontinue if neuroleptic malignant ...

The pharmacokinetics of promethazine hydrochloride after administration of rectal suppositories at three dosage strengths and oral syrup were studied. The study had an open-label, randomized ...

One of the older fads is in the news again: getting high from cough and cold medicines containing dextromethorphan (DXM). This drug is sometimes combined with prescribed promethazine with codeine.

In addition, a number of subjects in each treatment group had measurable promethazine concentrations at time zero (carry-over from the previous dose), ranging from 0.05 to 1.3 ng/mL. The mean ...