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How Long Does It Take for Benadryl To Work

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How long does it take for benadryl to work?

5 Answers

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for a 37 yr old how long does it take for benadryl to work

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Between 15-60 minutes

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About 30 mins to an hour. Depending on how much liquid to take the pills with. If its in syrup form, about half an hour.

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I have a severe case of hives possibly caused by medications for bronchittis.  I took 2 tablets of Benadryl liqui-gels.  After 3 hours, I haven't felt much relief.  Does it take a few days, or just more today every 4 to 6 hours to begin to feel some relief?

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Benadryl, or diphenhydramine hydrochloride, when taken by mouth, works within 15 to 60 minutes. When injected through a muscle, it takes 20 to 30 minutes to work. When injected through a vein, it works rapidly. The effects of diphenhydramine hydrochloride work for approximately 4 to 8 hours, regardless of the form in which it is taken.

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