Generic Phenergan (Promethazine) 25mg QtyUSD($)$/tabPharmacyOrder 60130.224rx 120250.214rx Promethazine dm syrup consists of two medications in combinations. They are promethazine and dextromethorphan. While promethazine is an effective anti-histmaine and anti- emetic medication, dextromethorphan helps in liquefying thick mucus as it is an anti-tussive agent. Promethazine finds use in conditions like allergic reaction or motion sickness and [...]