A 18-year-old male asked:
does long term use of zyrtec (cetirizine) cause possible forgetfulness and drowsiness?
1 doctor answer
Dr. Michelle Zetoony answered
17 years experience Sleep Medicine
It can: Zyrtec (cetirizine) is antihistamine and histamine is active in brain so it is entirely possible to cause mental cloudiness and neuro changes. Has less 'sleepiness' than other antihistamines but doesn't mean it is without side effects.
Answered on Nov 14, 2020
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