<prompt> Which of the following drugs can cause galactorrheaBromocriptinePantoprazoleMetoclopramideOmeprazole  <response>: Ref: KDT, 6th ed. pg. 643 Galactorrhea is caused by increased level of prolactin. Normally, this prolactin is in inhibited state by Dopamine. Prolactin is under predominant inhibitory control of hypothalamus through PRIH Prolactin Release Inhibitory Hormone, which is Dopamine that acts on pituitary lactotrope D2 receptor. Dopaminergic agonist like bromocriptine, DA and cabergoline decrease plasma prolactin levels and is used to treat hyperprolactinemia. Dopaminergic antagonists like chlorpromazine, haloperidol, metoclopramide causes hyperprolactinemia by blocking D2 receptors. 