Description

Promethazine is a prescription medication used to treat:

. Allergies (hay fever, allergic rhinitis)
. Nausea and vomiting
. Motion sickness
. Insomnia (short-term)
. Anxiety and sedation before surgery

Available forms of promethazine are,

Tablets, Syrup, Injection, Rectal suppositories

.

Common dosages for promethazine 

. Allergies: 12.5-25 mg every 4-6 hours
. Nausea/vomiting: 12.5-25 mg every 4-6 hours
. Motion sickness: 25 mg 30 minutes before travel
. Insomnia: 25-50 mg at bedtime
. Pre-surgery: 25-50 mg 30 minutes before