Go ask anyone who starts to snort and sniffle when pollen is high and the smell of fresh cut grass wafts through the air, and they'll tell you, antihistamines are a godsend.
Antihistamine medication is used to stop allergic reactions. Histamines in the body cause fluid to escape from capillaries resulting in swelling, itching, and sneezing.
But those beloved antihistamines, most of which you can get over-the-counter without a doctor's note, might come with a heavy price to pay -- weight-gain.
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