nausea/vomiting
"Promethazine is a histamine blocker. 25mg is an average dose for adults. Can also be taken with most pain medicines such as Vicodin, Toradol, tramadol, NSAID types (Advil, Celebrex, Aleve) please check with doctor before combining medicines. Makes you a little tired but not bad. Some people report promethazine also works for anxiety and stress. "