[The effect of aminazin on thyroid gland function and lactation in goats]

The authors showed that cholrpromazine diminished the accumulation of radioactive iodine in the thyroid gland of lactating goats, and at the same time increased the milk yield and richness. This can be attributed to the influence of chlorpromazine on the hypothalamic centres, leading to reduction of thyrotropic hormone secretion and an increase of prolactin synthesis. Rhythmic changes in the thyroid gland function are seen during lactation. During milking or kid nursing there occurred an increase in the thyroid gland function and more catecholamines were secreted; the activity of the thyroid gland diminished and there was an increase in prolactin secretion after milking.