Effects of methyserrgide, pizotifen and ergotamine in the monkey cranial circulation
| Autor: | Paul J. Spira, J.W. Duckworth, E J Mylecharane, Jusuf Misbach, James W. Lance |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Serotonin
medicine.medical_specialty Methysergide Bradykinin Thiophenes Pizotifen Norepinephrine chemistry.chemical_compound Internal medicine Ergotamine medicine Animals Prostaglandin E1 Pharmacology Pizotyline business.industry Prostaglandins E Haplorhini Endocrinology chemistry Cerebrovascular Circulation Dilator cardiovascular system Macaca medicine.symptom business Vasoconstriction Histamine medicine.drug |
| Zdroj: | European Journal of Pharmacology. 48:1-9 |
| ISSN: | 0014-2999 |
| DOI: | 10.1016/0014-2999(78)90038-9 |
| Popis: | Internal and external carotid vascular resistances were measured, in anaesthetized monkeys, to asses the direct cranial vascular effects of i.v. methysergide, pizotifen and ergotamine, and their effects on the cranial vascular responses to the constrictors 5-hydroxytryptamine and noradrenaline and the dilators histamine, prostaglandin E1 and bradykinin. Methysergide reduced responses to 5-HT, and tended to potentiate the external carotid responses to noradrenaline. Pizotifen blocked responses to histamine; it tended to reduce internal carotid responses to 5-HT, but it potentiated external carotid 5-HT responses. Ergotamine reduced responses to 5-HT and noradrenaline, but this was probably related to its cranial vasoconstrictor effects, especially in the external carotid circulation. Methysergide induced weak transient cranial vasoconstriction and pizotifen had no direct effects. These findings may be relevant to the therapeutic actions of these drugs in migraine, since the doses used approximated to those used clinically. |
| Databáze: | OpenAIRE |
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