Histamine Receptors, Location-Agonist-Antagonist
| HSTAMINE RECEPTORS | |||
| Receptor | Location | Agonists | Antagonists |
|
H 1 |
Smooth muscle, endothelium, brain | Histaprodifen |
Mepyramine, Loratadine |
|
H 2 |
Gastric mucosa, cardiac muscle, mast cells, brain | Amthamine |
Ranitidine, Tiotidine |
|
H 3 |
Presynaptic Brain, Myenteric plexus, other neurons |
R-a-Methyl histamine, Imetit, Immepip |
Thioperamide, Iodophenpro pit |
| H4 |
Eosinophils, neutrophils, CD4 T cells |
Clobenpropit, Imetit, Clozapine | Thioperamide |
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