Get Virtual Care
For Businesses
About Us
A member asked:
If cetirizine makes one sleepy, how long does this side effect last? (both acutely after taking it and over time.)
A doctor has provided 1 answer
24 hours: Cetirizine is a 24 hour medicine, initially the first 5 to 6 hours you may experience the most of its sedating effect and it starts wearing off, sometime you may have residual fatigue the following day.
Answered 7/16/2014
5.3k views
Thank
Related Questions
A member asked:
Does long term use of zyrtec (cetirizine) cause possible forgetfulness and drowsiness?
A doctor has provided 1 answer
A member asked:
What are some anti-histamine medications that do not cause drowsiness? Having a bad experience with zyrtec (cetirizine).
A doctor has provided 1 answer
A member asked:
I am on Zyrtec (cetirizine) and Flonase for severe Hayfever. Neither should cause drowsiness but I feel severely tired&like I almost have to be reminded to breathe?
A doctor has provided 1 answer
People also searched for:
I end up sneezing all the time when on Vacation in India. Is there any nasal spray I can get over the counter? Tried Zyrtec and it made me very sleepy
What can I do for extreme sleepiness after taking Xanax 2 hours after taking Zyrtec?
I have cetirizine HCl 10mg, is it going to make me sleepy?
Is it ok to take 20 mg of zyrtec (cetirizine) at once? and will i feel sleepy?
I have been taking Zyrtec right in the morning since two days. It has removed sneezing etc, but I feel sleepy and lethargic during day. When to take?
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HIPAASecure
SOC 2 Type 2Certified
JCAHOAccredited
Download HealthTap
Video visit and message your doctor
