Anatomical Therapeutic Chemical Classification System
Aprepitant is a selective high-affinity antagonist at human substance P neurokinin 1 (NK1) receptors.
Dimenhydrinate is a theoclate salt of the ethanolamine derivative diphenhydramine. It exhibits reversible competitive antagonism with histamine for the capture of H1 receptors. It has anticholinergic (antimuscarinic) properties that explain the anti-emetic action of the drug in cases of labyrinthial irritation (nausea, vertigo), and the central suppression it causes.
Fosaprepitant is the prodrug of aprepitant and when administered intravenously is converted rapidly to aprepitant. The contribution of fosaprepitant to the overall antiemetic effect has not fully been characterised, but a transient contribution during the initial phase cannot be ruled out.
Granisetron is a potent anti-emetic and highly selective antagonist of 5-hydroxytryptamine (5HT3 receptors). Pharmacological studies have demonstrated that granisetron is effective against nausea and vomiting as a result of cytostatic therapy.
Netupitant is a selective antagonist of human substance P/neurokinin 1 (NK1) receptors. Delayed emesis has been associated with the activation of tachykinin family neurokinin 1 (NK1) receptors (broadly distributed in the central and peripheral nervous systems) by substance P. As shown in in vitro and in vivo studies, netupitant inhibits substance P mediated responses.
Ondansetron is a potent, highly selective 5HT3 receptor-antagonist. Its precise mode of action in the control of nausea and vomiting is not known.
Palonosetron is a selective high-affinity receptor antagonist of the 5HT3 receptor.
Rolapitant is a selective antagonist of human substance P/neurokinin 1 (NK1) receptors.
Tropisetron is a highly potent and selective competitive antagonist of the 5-HT3 receptor. Tropisetron selectively blocks the excitation of the presynaptic 5-HT3 receptors of the peripheral neurons in this reflex, and may exert additional direct actions within the CNS on 5-HT3 receptors mediating the actions of vagal input to the area postrema.