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Phenergan Side Effects Center
Medically reviewed by Min Clinic Staff | Updated: January 2026
- Generic Name: promethazine
- Brand Name: Phenergan
- Drug Class: Antiemetic Agents, How Do First Generation Antihistamines Work?
Phenergan (Promethazine) side effects drug center
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Phenergan Side Effects Center
What Is Phenergan?
Phenergan (promethazine HCI) is an antihistamine used to treat nausea and vomiting related to certain conditions (e.g., motion sickness, before/after surgery). Phenergan is also used to treat allergic symptoms such as rash, itching, and runny nose. The brand name Phenergan is discontinued in the U.S. Phenergan is available as a generic drug.
What Are Side Effects of Phenergan?
Common side effects of Phenergan (promethazine HCI) include