Promethazine, commonly known as Phenergan, is primarily used as an antihistamine to alleviate symptoms of allergies. It can also help with nausea and vomiting. But additionally, it can also have a calming and sedating effect and may therefore also be used to help with agitation, anxiety and insomnia. It must be used carefully as there is a risk of excessive sedation, especially when people take it recreationally. #promethazine #medication #phenergan psychiatry #psychiatrist #mentalhealth | Dr Ja