Pharm 43 Histamine Flashcards
MOA:
Inverse agonists binding preferntially to inactive conformation of H1 receptors
First-Generation H1-Antihistamine
More CNS affect (more lipid soluble)
First-Generation H1-Antihistamine
Ethanolamines (1st generation) (4)
Diphenhydramine, Carbinoxamine, Clemastine, Dimenhydrinate
Tx:
Allergic rhinitis, insomnia, motion sickness, urticaria, anaphylaxis, parkinsonism
First-Generation H1-Antihistamines
Ethylenediamines (1st generation) (2)
Pyrilamine, Tripelennamine
Alkylamines (1st generation) (2)
Chlorpheniramine, Brompheniramine
Piperidines (1st generation) (2)
cyproheptadine, phenidndamine
Phenothiazine (1st generation) (1)
Promethazine
Tx:
preoperative anxiety and reduce postoperative nausea and vomiting
Promethazine (1st generation)
Piperazines (1st generation) (3)
Hydroxyzine, Cyclizine, Meclizine
Tx:
Pruritis, alcohol withdrawal, motion sickness, vertigo
Hydroxyzine, cyclizine, meclizine (1st generation)
Tricyclic dibenzoxepins (1st generation) (1)
Doxepin
Tx:
Anxiety, Depression, Pruritis
Doxepin
Piperizines (2nd generation) (2)
Cetirizine, Levocetirizine
Considerations:
less sedating, less anticholinrgic effects
2nd generation H1-Antihistamine