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| Histamine Agonists Histamine H1 Agonists | Histamine H2 Agonists | Histamine H3 Agonists | H1 Agonist | H1 Agonists | H2 Agonist | H2 Agonists | H3 Agonist | H3 Agonists | Histamine Agonist | Histamine H1 Agonist | Histamine H1 Receptor Agonist | Histamine H2 Agonist Drugs that bind to and activate histamine receptors. Although they have been suggested for a variety of clinical applications histamine agonists have so far been more widely used in research than therapeutically. |