The man has been unable to ejaculate may be due to high prolactin levels or due to urethral obstruction caused by prostate enlargement or chronic prostatitis, which requires further examination including blood tests for prolactin levels, routine prostate fluid, and ultrasound of the prostate to clarify the diagnosis. If the level of prolactin is too high, you can take oral bromocriptine tablets for 2-3 months to lower the prolactin and then the ejaculation will return to normal. You should also check the pituitary MRI, if there is a pituitary adenoma, you also need to do the gamma knife treatment. If it is clear through the examination that the symptoms are due to prostate enlargement or chronic prostatitis, you can choose medications such as doxazosin tablets or terazosin hydrochloride capsules to continue oral treatment for about four weeks to be able to restore normal ejaculation situation.