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2. Hydroxyzine - Wikipedia

   en.wikipedia.org/wiki/Hydroxyzine

   Hydroxyzine can also be used for the treatment of allergic conditions, such as chronic urticaria, atopic or contact dermatoses, and histamine-mediated pruritus. [ medical citation needed ] These have also been confirmed in both recent and past studies to have no adverse effects on the liver, blood, nervous system, or urinary tract.

3. Urocanic acid - Wikipedia

   en.wikipedia.org/wiki/Urocanic_acid

   It is formed from L-histidine through the action of histidine ammonialyase (also known as histidase or histidinase) by elimination of ammonium. In the liver, urocanic acid is transformed by urocanate hydratase (or urocanase ) to 4-imidazolone-5-propionic acid and subsequently to glutamic acid .

4. Ebastine - Wikipedia

   en.wikipedia.org/wiki/Ebastine

   Ebastine is a H 1 antihistamine with low potential for causing drowsiness.. It does not penetrate the blood–brain barrier to a significant amount and thus combines an effective block of the H 1 receptor in peripheral tissue with a low incidence of central side effects, i.e. seldom causing sedation or drowsiness.

5. EBGLYSS for eczema: What to know about the newly FDA ... - AOL

   www.aol.com/ebglyss-eczema-know-newly-fda...

   A newly approved drug for the treatment of atopic dermatitis could make a big difference to people with moderate-to-severe eczema. Image credit: Sascha Lotz/picture alliance via Getty Images.

6. H1 antagonist - Wikipedia

   en.wikipedia.org/wiki/H1_antagonist

   Histamine, acting on H 1-receptors, produces pruritus, vasodilation, hypotension, flushing, headache, bradycardia, bronchoconstriction, increase in vascular permeability and potentiation of pain. [2] While H 1-antihistamines help against these effects, they work only if taken before contact with the allergen.

7. Histamine agonist - Wikipedia

   en.wikipedia.org/wiki/Histamine_agonist

   A histamine agonist is a drug which causes increased activity at one or more of the four histamine receptor subtypes.. H 1 agonists promote wakefulness. [1]H 2: Betazole and Impromidine are examples of agonists used in diagnostics to increase histamine.