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Probably: Although the usual dose of zyrtec (cetirizine) for an adult is 10 mg daily, under the direction of a physician, some patients may need more. It would be important to discuss the dosing with your physician as another approach to treatment may be indicated. Avoid drinking alcohol and be aware that drowsiness may be more likely at higher doses. ...Read moreSee 1 more doctor answer
I accidentally took an expired (18 months ago!) Zyrtec pill. Should I take the correct (unexpired) one nowbad well or should I wait 24 hours?
Wait: Medication can lose it's effectiveness past expiration date, but I would not expect it to not be effective at all; especially if only 18 months expired. It will not be harmful at all that you took an expired zyrtec. It will probably still be almost as effective as it was prior to expiration, so I would just wait and take a new one at your normal time the next day. Hope this helps! ...Read more
Allergies and hives: Zyrtec (cetirizine) is a new generation antihistamine that is FDA approved for relieving the symptoms of :: Seasonal Allergic rhinitis (hay fever) from pollen in patients over 2 years old Perennial allergic rhinitis: year round allergies in patients over 6 months old Chronic Urticaria (hives) in those over 6 months old It has been shown to prevent itching and decrease size of mosquito bites! ...Read moreSee 2 more doctor answers