retrograde ejaculation
the ejaculation of semen in a reverse direction, into the urinary bladder, from which it is excreted later. This may be a result of surgery of the prostate gland, and it also occurs when the penis is squeezed just before ejaculation—a misguided attempt at preventing impregnation. Retrograde ejaculation is occasionally associated with the use of antidepressants, including the tricyclic antidepressants and SSRIs, as well as conventional antipsychotic agents (particularly thioridazine). There are also reports of retrograde ejaculation with atypical antipsychotics (e.g., risperidone).