Q. Taking Avodart triggered the onset of both erectile dysfunction and reduced ejaculate for me. I took it for two years; my prostate did not shrink, but my penis did.

These sexual side effects linger. Five years later, I still have ED and low ejaculate. The symptom of frequent nightly urination, however, has ceased to be a problem. Will the sexual side effects ever go away?

A. Medications that shrink the prostate include dutasteride (Avodart) and finasteride (Proscar). These drugs are prescribed to treat symptoms of benign prostate enlargement. Lower dose finasteride (Propecia) is also prescribed for male pattern baldness.

A study published in the Journal of Sexual Medicine (Nov. 2012) reported persistent sexual side effects in men who took finasteride. These included reduced sexual arousal, lower ejaculate volume, erection difficulties and inability to reach orgasm. The study subjects also complained of smaller penis size and reduced sensation. It is not clear how long these complications may last. Dutasteride is likely to have similar side effects (Urology, March 2014).

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  1. Dan
    United Kingdom

    Don’t know but Propecia can and has shrunk my genitals, I regret ever taking it of course especially when there doesn’t seem to be much hope of recovering 100%

  2. Lt
    Edmonton Ab

    I have been taking finasteride and silodosin for enlarged prostate now I have ED and my penis has shrunk if I stop taking these two drugs will my other two problems go away

  3. Donnie

    My husband takes Saw Palmetto for his protate and it works well for him. I gave it to a male dog, with his vets approval, and it worked very well for him, too.

  4. B.J.

    Is their a safe substitute for these two drugs for male pattern baldness? Finasteride/Avodart causes hypothyroidism is some users.

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