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This is Dr. Davidif you had retrograde ejaculation, you would still notice climax sensation but no ejaculate coming outif you are taking medications like SSRI agents like sertraline or or escitalopram or paroxetine or fluoxedtine or others, these medications and other medications can cause sexual dysfunction and ejactulatory dysfunction.there are treatments for SSRI caused sexual dysfunction.there is a medication Cyproheptadine which is an antihistamine with antiserotonergic properties that has been reported for over a decade to reverse antidepressant-induced sexual dysfunctionyou can talk to your doctor about that.enlarged prostate gland or benign prostate hypertrophy would not cause lack of ejaculation, it would cause problems with urine outflow obstruction.Alfuzosin would not help with ejactulation problems. it is used to shrink the prostate for benign prostatic hypertrophy.
ejaculation is controlled by the sympathetic nervous which come from the sacral plexus.
erections is controlled by the parasympathetic nerves which come from the sacral plexus.