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A member asked:
Hi. my allergies are killing me! nose won't stop running and i am quite drowsy... been taking zyrtec (cetirizine) regulary for over a month! is it okay to take every 12 hours?
A doctor has provided 1 answer
Zyrtec (cetirizine): Although on rare occasion Zyrtec (cetirizine) may be taken twice a day, it can cause drowsiness. Check with your PCP for a more effective way to treat your allergies with less side effects.
Answered 9/23/2019
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I took zyrtec (cetirizine) d for allergy about 3 hours ago. I am still sneezing and blowing my nose. Should I take another? They are 12 hour.
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I'm having bad allergies especially a runny nose, i took zyrtec about 5 hours ago and its not helping. Can I take benadryl (diphenhydramine) now?
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