A histamine agonist is a drug which causes increased activity at one or more of the four
histamine receptor
The histamine receptors are a class of G protein–coupled receptors which bind histamine as their primary endogenous ligand.
There are four known histamine receptors:
* H1 receptor
* H2 receptor
* H3 receptor
* H4 receptor
Comparison
Ther ...
subtypes.
H
2:
Betazole and
Impromidine are examples of agonists used in diagnostics to increase histamine.
H
3:
Betahistine is a weak Histamine
1 agonist and a very strong Histamine
3 antagonist (paradoxically histamine increasing).
See also
*
Histamine antagonist
Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides re ...
External links
*
*
{{pharmacology-stub