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

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

    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 The ...

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

    Allergy Tablet. Xyzal, a.k.a. levocetirizine, "is the best prescription-strength oral antihistamine," Dr. Li says. It helps with sneezing, a runny or itchy nose or itchy throat, and watery eyes.

  4. Antihistamine - Wikipedia

    en.wikipedia.org/wiki/Antihistamine

    Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]

  5. H1 antagonist - Wikipedia

    en.wikipedia.org/wiki/H1_antagonist

    H 1 antagonists, also called H 1 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 not true antihistamines.

  6. Chlorphenamine - Wikipedia

    en.wikipedia.org/wiki/Chlorphenamine

    It is a first-generation antihistamine and works by blocking the histamine H 1 receptor. [2] Common side effects include sleepiness, restlessness, and weakness. Other side effects may include dry mouth and wheeziness. [2] Chlorpheniramine was patented in 1948 and came into medical use in 1949. [3] It is available as a generic medication and ...

  7. Dimetapp - Wikipedia

    en.wikipedia.org/wiki/Dimetapp

    Dimetapp is an American brand of over-the-counter cold and allergy medicines that is manufactured by Foundation Consumer Brands. At one point, Dimetapp as a household word referred to a single combination preparation marketed to relieve symptoms of the common cold, containing brompheniramine (an antihistamine) and phenylephrine (decongestant replacing the formerly used pseudoephedrine, which ...

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