Pharmacological studies with scorpion ( Palamneus gravimanus) venom: evidence for the presence of histamine

The venom from the scorpion Palamneus gravimanus caused, in cats, a pronounced hypotensive effect which was blocked by mepyramine. The hypotensive effect was observed in spinal and reserpinized cats, was not affected by carotid sinus and body denervation and bilateral vagotomy, and was not blocked b...

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