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A member asked:
Why does benadryl (diphenhydramine) causes drowsiness?
A doctor has provided 1 answer
Enters the brain: The molecular structure of benedryl allows it to enter the brain where it can interfere with the chemicals that transfer messages between brain cells. In most people it causes drowsiness, in some it will cause the opposite. Newer antihistamines like loritadine & fexofinadine have molecular structures that prevent entry into the brain, so they don't make you drousy.
Answered 6/23/2018
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Related Questions
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Please let me know if there is anything that contains the same ingredients that Benadryl (diphenhydramine) has but its non drowsy?
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How long does Benadryl (diphenhydramine) keep you drowsy?
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How long does it take for Benadryl (diphenhydramine) to make you drowsy?
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Can you tell me when does the drowsy feeling of Benadryl (diphenhydramine) go away?
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I took 1 25mg benadryl (diphenhydramine) nd i feel the effect but if i take 2 it makes me to drowsy i wanted to know if i can take half of 1?
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