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Antihistamines And Heart Rate


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I'm trying to cut back on the huge doses of antihistamines I take, without letting my allergies worsen. I had been taking allegra 180, zyrtec 10, singulair 10, and benadryl 25-50 prn. After two days of not taking the zyrtec, my resting heart rate (seated), has gone from 77 to 58.

I notice the allegra wearing off by the time of the next dose, but so far not too bad.

(At one point I was taking DOUBLE those amounts--under a doctor's supervision, for terrible allergies that had required prednisone. My doctor thought that allegra was less likely to raise my heart rate than the zyrtec...If I do need more than 180 allegra, I'll ask about my doc about doubling the allegra, rather than adding the zyrtec to the allegra.)

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