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Vasopressin, also known as ADH or anti-diuretic hormone stimulates the AVP1A receptors (AVPR1A) which are present in the brain, kidneys, liver and vessels. It causes kidney water retention, peripheral vasoconstriction in higher doses, the release of several clotting factors and gluconeogenesis. Also, per this study it stimulates glycogen breakdown in the liver, similar to the effects of glucagon.
Gluconeogenesis is the second way the body maintains blood sugar levels. (The first is glycogenolysis, the body’s conversion of glycogen stores into glucose) In gluconeogenesis, the body generates glucose from non-carbohydrates such as lactate (lactic acid, milk acid), glycerol (glycerin) and glycogenic amino acids.
I’m not sure how water retention and glucose generation are related but I’m still thinking
There are quite a few other seemingly unrelated actions that vasopressin causes on other receptor sites so I’m not sure the actions have to be related.