Editing Retrograde ejaculation (section)

===Medications===
* [[Tricyclic antidepressant]]s like [[imipramine]].
* Antihistamines like [[chlorphenamine]].
* Decongestants like [[ephedrine]] and [[phenylephrine]].

These medications tighten the bladder neck muscles and prevent semen from going backwards into the bladder. However, the medications do have many side effects and they have to be taken at least 1–2 hours prior to sexual intercourse. In many cases, the medications fail to work at the right time because most men are not able to predict when they will have an orgasm.{{Citation needed|date=July 2013}}