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A member asked:
Please tell me the onset of action of phenergan (promethazine) suppositories? how long after inserting can i use the restroom? how long will the medicine last?
A doctor has provided 1 answer
Phenergan (promethazine) supp.: Phenergan (promethazine) suppositories usually dissolve completely and start to work in approximately half an hour. Phenergan (promethazine) is usually recommended at 4 hour intervals.
Answered 10/28/2014
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