Promethazine (Phenadoz, Phenergan, Promethegan) can cause gangrene and should only be used in a deep intramuscular injection, according to a warning from the U.S. FDA. Promethazine is used in ...

An old drug with a wide range of uses now has a new FDA alert that could spare patients from some severe reactions. The FDA communication covers promethazine hydrochloride, a medicine approved for ...

Overview: Promethazine is a medicine used to help with allergy symptoms, reduce or prevent nausea and vomiting in certain situations, or provide sedative or pain-relieving effects after surgery. It ...