TOO MUCH: That is too much cetirizine! This can cause a range of effects, including blurry vision, dry mouth, nausea, dizziness, weakness, drowsiness, tremor, even seizures. The regular dose of cetirizine is 10 mg. See a a primary care doctor or an allergist if you think you need more than the regular dose for a specific medical condition.
Answered 11/28/2017
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