The risk for heat-related illness and death may increase among people using the following drugs: Psychotropics, which affect psychic function, behavior, or experience (e.g. haloperidol or chlorpromazine); Medications for Parkinson’s disease, because they can inhibit perspiration; Tranquilizers such as phenothiazines, butyrophenones, and thiozanthenes; and Diuretic medications or “water pills” that affect fluid balance in the...