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A 37-year-old member asked:

is it safe to take two zyrtec (cetirizine) a day, one in the morning and one at night?

2 doctor answers2 doctors weighed in
Dr. Thomas Byrnes
Family Medicine 29 years experience
Sedation: That dose of zyrtec is going to be very sedating. This defeats the purpose of taking zyrtec instead of benadryl (diphenhydramine). That level of sedation will make you a drowsy --> dangerous driver. Have you tried Loratadine or allegra? Do you use Flonase or something like it? Do you regularly flush your nose with a saline/ baking soda solution?
Dr. Jon Fishburn
Ophthalmology 30 years experience
Maximum 10mg: The maximum dosage for Cetirizine is 10 mg daily. Cetirizine is available in 5 and 10 mg tablets. Therefore, a 5mg morning dose followed by a 5mg dose 12 hours later is acceptable. Remember to take it only for allergy symptoms. Good luck!

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Last updated Jan 14, 2021
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