<prompt> Prolactin is decreased by:Dopamine excessMetoclopromideHypothyroidismEmotional stress  <response>: A Dopamine excess Prolactin: Prolactin PRL or Luteotropic hormone LTH is a peptide hormone primarily associated with lactation Conditions associated with elevated prolactin secretion Hyperprolactinaemia is the term given to having too-high levels of prolactin in the blood. Prolactinoma Excess thyrotropin-releasing hormone TRH, usually in primary hypothyroidism Many anti-psychotic medications Emotional stress Pregnancy and Lactation. Conditions associated with decreased prolactin Bulimia, Excess dopamine 