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2. Antihistamine - Wikipedia

   en.wikipedia.org/wiki/Antihistamine

   An H 3-antihistamine is a classification of drugs used to inhibit the action of histamine at the H 3 receptor. H 3 receptors are primarily found in the brain and are ...

3. 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.

4. Doxepin - Wikipedia

   en.wikipedia.org/wiki/Doxepin

   Doxepin is a highly potent antihistamine, with this being its strongest activity. [49] [53] [57] [8] In fact, doxepin has been said to be the most or one of the most potent H 1 receptor antagonists available, with one study finding an in vitro K i of 0.17 nM. [37]

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

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

   “This is a second-generation antihistamine, which is less sedating than the first-generation antihistamines like Benadryl,” says Shaan Waqar, MD, an allergist and immunologist with ENT and ...

6. Anti-allergic agent - Wikipedia

   en.wikipedia.org/wiki/Anti-allergic_agent

   Antihistamines, specifically H1-antihistamines, are medicines which provide relief for allergic symptoms such as runny nose, sneezing, itching, and watery eyes from seasonal allergies . They are usually the first line of medications prescribed by a general practitioner, or a pharmacist for allergies in a community pharmacy.

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. [9] Effects of histamine (which are countered by antihistamines) include: Increased capillary permeability; Increased capillary dilatation; Edema (i.e., swelling ...