Bromocriptine is an ergot alkaloid and dopamine D2 receptor agonist that has been used to treat Parkinson’s disease by affecting dopamine receptor signaling in the nigrostriatal tract and to treat hyperprolactinemia and acromegaly through tuberoinfundibular pathways (Kvernmo et al., 2006). This evidence concerns the gene DRD2 and hyperprolactinemia.