Cyproheptadine (cyp.), an antagonist of histamine and serotonin, has been reported to stimulate appetite and a sequent increase in body weight, when applied the asthmatic and other patients.
But among a number of animal reports of experiments in rats, cats and dogs, there are some in which the authors conclude that the experimental animals have no evidence of any increase appetite or weight gain, though there are some others where the experimental animals have shown some evidence.
And in the latter cases, cyp. is reported to have effect on lateral and veritromedial hypothalamus of the rats and the cats.
And so, in order to examine these observations more thouroughly, a study was undertaken in four groups of rats.
1. The healthy rats weighing from 50 to 100 g received cyp. in dosage of 0.1 mg/kg/day, 0.2 mg/kg/day, 1 mg/kg/day, 2 mg/kg/day, 4mg/kg/day separately.
The data on weight gain and the increase of appetite shows that they had no effect.
2. The rats was injected with CCl
4 (0.05 ml/100 g or 0.1 ml/100 g) receiving cyp. in dosage of 2.5mg/kg/day.
The data on weight gain and the increase of appetite shows that it had no effect.
After injection the weight of rats fell sharply.
But after several days, appetite and weight gain was increased especially in the group of receiving cyp.
3. The rats were injured with the operation of the abdormen 2 cm long receiving cyp. in dosage of 2.5 mg/kg/day.
The data on weight gain and appetite shows that it had no effect.
4. The rats were injured with the exstilpation of one adrenal receiving cyp. in dosage of 2.5 mg/kg/day.
Few days after the operation, weight and appetite increased slightly in the group of receiving cyp. than controls.
Authors think the effect of cyp. on the patients suffering from bronchial asthoma, neurosis, etc. are derived from the sedative and psychological actions of cyp.
View full abstract