Stuart C. Sealfon, M.D., is an American neurologist who studies the mechanisms of both the therapeutic and adverse effects of drugs. He was an early adopter of the use of massively parallel qPCR and fluorescent in situ hybridization to characterize cell response state and his research accomplishments have included the identification of the primary structure of the gonadotropin-releasing hormone receptor, finding new signaling pathways activated by drugs for Parkinson's disease, elucidating the mechanism of action of hallucinogens and finding a new brain receptor complex implicated in schizophrenia as a novel target for antipsychotics.