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2. These Pictures Will Help You Identify the Most Common ... - AOL

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   Poison ivy. What it looks like: Poison ivy is a type of allergic contact dermatitis that is caused by the oil (urushiol oil) in the poison ivy plant, explains Karan Lal, D.O., M.S., F.A.A.D ...

3. Histidine - Wikipedia

   en.wikipedia.org/wiki/Histidine

   Histidine ball and stick model spinning. Histidine (symbol His or H) [2] is an essential amino acid that is used in the biosynthesis of proteins.It contains an α-amino group (which is in the protonated –NH 3 + form under biological conditions), a carboxylic acid group (which is in the deprotonated –COO − form under biological conditions), and an imidazole side chain (which is partially ...

4. What's causing your red, itchy rash? Eczema pictures can help

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   Nummular eczema, also called discoid eczema, is a type of eczema rash that shows up in a distinctive round pattern. The rashes may be itchy, red and raised ovals, the AAD says , and there may be ...

5. 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]

6. Topical glucocorticoids - Wikipedia

   en.wikipedia.org/wiki/Topical_glucocorticoids

   If an inappropriate formulation is administered, the therapeutic effect of the treatment may be delayed and rendered insufficient. [2] The condition will even be worsened in some cases. For instance, usage of a topical glucocorticoid gel on fissured hand eczema intensifies the pain as well as stinging because of the alcohol present in the gel.

7. Think You Have Eczema? These Pictures Show Exactly How the ...

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8. 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.

9. 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 .