Effect of adrenergic receptor blockers on the cardio-respiratory response to cow's urine concoction in rats
Oyebola, D.D.; Ariwodola, J.O.
African Journal of Medicine and Medical Sciences 14(1-2): 11-19
1985
ISSN/ISBN: 0309-3913 PMID: 2863966 Document Number: 254319
The influence of .alpha. and .beta. adrenoceptor blockers on the cardio-respiratory effects of cow's urine concoction (CUC) in rats was studied. Phenoxybenzamine abolished the pressor response observed in the untreated animal while propranolol had no effect on blood pressure response. The .alpha.-blocked animals also developed significant post-injection hypotension. Electrocardiographic abnormalities seen in the control group were ameliorated by .beta.-blockers but .alpha.-blockers had no such effect. CUC caused an initial depression of respiration with short apnoeic phases and an increase in pulmonary ventilation. The latter was significantly decreased by .alpha. and .beta. adrenoceptor blockers. Adrenoceptors play an important role in the cardio-respiratory effects of CUC.