Avoid combination: Both Zyrtec & Benadryl (diphenhydramine) are antihistamines and as such, should not be taken together in same 24hr period due to potential interactions (http://www.drugs.com/interactions-check.php?drug_list=896-1617,569-286). Maximum dose of Zyrtec is 10mg daily so best to avoid exceeding that amount. Check out goo.gl/2dmzkm, goo.gl/v31okZ & http://goo.gl/uYTfTC for more info re chronic urticaria (hives).
Answered 5/17/2015
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