Twenty physically healthy men with schizophrenia responded to a 15-item questionnaire inquiring about their usual and their present (on medications) sexual functioning. Two summary measures of present impairment (the average of items 7-13 that detail the patients' specific complaints of impairment, and item 15, the interviewer's global judgment of impairment) were significantly correlated with each other and with the differences between usual and present reported frequencies of erection and masturbation. More severe impairment on these summary measures was significantly associated with greater biological evidence of dopamine blockade (more severe extrapyramidal side effects and higher serum prolactin levels).