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Pharmacology General 908a356a

Prolactin secretion is inhibited by -

A
Dopamine antagonist
B
GABA
C
Neurophysin
D
Bromocripitine
High-Yield Explanation
Ans. is 'd' i.e., Bromocriptine o Prolactin is under predominant inhibitory control of hypothalamus through prolactin releasing inhibitory hormone (PRIH). o PRIH is a dopamine that acts on pituitary lactotrope D, receptor. So, Dopaminergic agonists decrease plasma prolactin levels. These agonists are : Dopamine Cobergoline Bromocriptine Apomorphine Dopaminergic antagonists and DA depleters will increase prolactin level Dopaminergic antagonists are : Dopamine depleters are : o Chlorpromazine o Reserpine o Haloperidol o Methyl dopa o Metoclopramide

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