Doctor insights on:
Zyrtec Claritin Interaction
Yes : Similarity: in the 2nd generation antihistamine class of drugs. Zyrtec and Claritin are safe in pregnancy. Both can cause dryness and urinary symptoms as a sideffect differences: Claritin does not usually cause drowsiness. Zyrtec typically can. The time it takes to be effective vary as well. As far as effectiveness: depends on person. Zyrtec in some studies have been shown to be faster acting. ...Read moreSee 1 more doctor answer
Yes: Antihistamines are well tolerated even when the dose is doubled or when one is taking 2 kinds of antihistamines. ...Read more
No additional benef: Since both of these meds work in very similar ways, there is likely to be very little additional benefit from using both, and much more likely to have side effects from the meds. if one alone is not working, talk to doc about what combination therapy may be more useful, including use of prescription med like Singulair. Also need to delve into allergen prevention so you won't need as much meds. ...Read more
Both antihistamines: Both Claritin and zyrtec are antihistamines. Each should last 24 hours for control of allergic rhinitis symptoms. However, some patients have more severe symptoms or may be using antihistamines for reasons other than allergic rhinitis and may require more frequent dosing of antihistamines including using Claritin and zyrtec same day. Recommend this be done under allergist supervision. ...Read more
I had 30 mg of Zyrtec on Monday, 40 mg of Claritin on Tuesday, and 30 mg of Claritin on Wednesday. When will it all be out of my system?
Med clearance: 50 - 60 percent clearance in 24-30 hours, then total clearance in 5-7 days ...Read more
Not necessary: Both Claritin and zyrtec are considered new generation antihistamines and have the same effects. If a person accidentally took these at the same time, there is likely no adverse effect, but there is really no need to take both for treatment of symptoms. If symptoms of allergies are not controlled, see an allergist for a better treatment plan. ...Read more
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