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Neuropharmacology. 1985 Apr;24(4):341-3.

Cardiovascular effects of tetanus toxin after systemic and intraventricular administration in rats.


A single intraperitoneal injection of tetanus toxin (50,100 and 200 minimum lethal dose per rat) produced a significant and dose-dependent increase in systemic blood pressure and heart rate in conscious rats. On the contrary, tetanus toxin, given directly into the third cerebral ventricle (20 and 40 minimum lethal dose), produced a gradual and dose-dependent decrease in blood pressure accompanied by bradycardia. In conclusion, the present findings show that tetanus toxin is able to affect cardiovascular activity and it is suggested that this may be due to an interference with central GABAergic mechanisms.

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