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A member asked:
How long does it take for thorazine (chlorpromazine) to take effect.?
A doctor has provided 1 answer
Thorazine (chlorpromazine): Depending on how it is administered & the dose. If given by intramuscular injection, effects usually within 5 minutes, by mouth it can take 15 to 30 minutes. This is for sedative effect. For psychoses, it can take up to 2-3 weeks.
Answered 11/2/2019
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