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  2. Which Allergy Medicine Is Actually Most Effective? - AOL

    www.aol.com/allergy-medicine-actually-most...

    The long-acting, over-the-counter medication lasts up to 24 hours per dose, according to the Food and Drug Administration (FDA). It reaches peak concentration in your body an hour after you take ...

  3. You May Want To Skip Allergy Meds With Decongestant In ... - AOL

    www.aol.com/may-want-skip-allergy-meds-155300887...

    More good news: Over-the-counter allergy medications are as effective as most prescription ones, says Evan Li, MD, an assistant professor of medicine, immunology, allergy, and rheumatology at the ...

  4. H1 antagonist - Wikipedia

    en.wikipedia.org/wiki/H1_antagonist

    H1 antagonists, also called H1 blockers, are a class of medications that block the action of histamine at the H 1 receptor, helping to relieve allergic reactions. Agents where the main therapeutic effect is mediated by negative modulation of histamine receptors are termed antihistamines; other agents may have antihistaminergic action but are ...

  5. It's Not in Your Head: Doctors Say Allergy Season Is ... - AOL

    www.aol.com/not-head-doctors-allergy-season...

    The good news is there are several over-the-counter (OTC) allergy medications that can bring relief. The not-so great news is browsing the allergy medication aisle at your local drugstore can be ...

  6. Fexofenadine - Wikipedia

    en.wikipedia.org/wiki/Fexofenadine

    Fexofenadine, sold under the brand name Allegraamong others,[10]is an antihistaminepharmaceutical drugused in the treatment of allergy symptoms, such as hay feverand urticaria. [11] Therapeutically, fexofenadine is a selectiveperipheralH1blocker.

  7. Clemastine - Wikipedia

    en.wikipedia.org/wiki/Clemastine

    Clemastine is an antihistamine with anticholinergic and sedative effects. Antihistamines competitively bind to histamine receptor sites, thus reducing the neurotransmitter's effects. Effects of histamine (which are countered by antihistamines) include: Clemastine inhibits both the vasoconstrictor and vasodilator effects of histamine.

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