Diphenidol has no actual broad antiemetic activity in dogs and ferrets.

Abstract:

:Previous studies showed that diphenidol was effective on emetogens-induced pica, eating of non-nutritive substances, in rats, a model analogous to emesis in other species. We evaluated the actual antiemetic activity of diphenidol against four emetic stimuli in the dog and ferret, animals that possess an emetic reflex. In dogs, emetic responses to apomorphine were significantly prevented by diphenidol (3.2 mg/kg, i.v.), whereas diphenidol (3.2 mg/kg, i.v. x 2) showed a weak inhibition to the vomiting evoked by cisplatin. In ferrets, diphenidol (10 mg/kg, i.p.) exhibited a weak antiemetic activity on the emesis induced by copper sulfate and had no activity on emesis by loperamide. On the other hand, CP-122,721, a NK1-receptor antagonist, significantly reduced the emetic episodes to all four stimuli. These results suggest that the prediction of antiemetic activity of compounds in animals lacking an emetic reflex does not always correspond with actual antiemetic activity.

journal_name

J Pharmacol Sci

authors

Nakayama H,Yamakuni H,Nakayama A,Maeda Y,Imazumi K,Matsuo M,Mutoh S

doi

10.1254/jphs.fpj04035x

subject

Has Abstract

pub_date

2004-11-01 00:00:00

pages

301-6

issue

3

eissn

1347-8613

issn

1347-8648

pii

JST.JSTAGE/jphs/FPJ04035X

journal_volume

96

pub_type

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