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Taking antihistamines, have occasional periods of shakiness, BP drop, rapid heart beats with sweating, confusion. Medical attention required?

Hello, I have been taking quite a few first generation antihistamines very frequently over the past few days, so over about 4-5 days i have taken 200-300mg of benadryl , 80mg of hydroxyzine , and 8mg of chlorpheniramine. I weigh 95lbs and am 5 5 , and a male. I have had occasional periods of shakiness, and have been shaky in general. I also have been experienced times where my blood pressure drops, and times where my heart beat speeds up. These symptoms were the worst 4 days ago and have been getting somewhat better. But I am wondering if I should wait out the current symptoms (high heart rate , feeling a tiny bit of low blood pressure, im not sweating, a small bit of confusion [not enough to make me even close to being non-lucid], bad dry mouth, and quite dilated pupils). Are these serious enough for me to need medical attention? If i try to sleep I feel that I could. Thanks
Asked On : Tue, 21 Aug 2012
Answers:  1 Views:  49
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General & Family Physician 's  Response
First generation antihistaminics cause few cardiovascular disturbances(not in everyone) like change in heart rate etc which might be sometimes serious.I suggest you to switch to second generation antihistaminics which are devoid of these side effects under medical supervision.Hope this helps.Take care.
Answered: Fri, 11 Oct 2013
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