What are promethazine suppositories?

Promethazine is a prescription antihistamine used to treat a variety of conditions. The suppositories are usually used to prevent nausea and vomiting, particularly after surgery when people cannot take anything by mouth. It is frequently used to treat allergy symptoms like sneezing, red and watery eyes, runny nose and itchy skin. It can induce sedation and prevent motion sickness. Promethazine does not treat the underlying condition, but instead treats the symptoms resulting from the condition. Promethazine, in the phenothiazines class of medications, blocks the action of histamine. The medication is available in several other formulations: tablet, oral solution and injection.

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