Side Effects of Dutasteride/Tamsulosin

Common Side Effects

Dutasteride/tamsulosin contains a combination of two medicines -- dutasteride (Avodart®) and tamsulosin (Flomax®). Although no clinical trials have been done on Jalyn alone, one clinical trial has been done using both dutasteride and tamsulosin together. In this study, the side effects reported by the men taking this combination of medications were carefully documented.
In this study, the most common side effects included:
  • Ejaculation problems, including decreased semen amount -- in up to 9.7 percent of men
  • Erectile dysfunction (ED) or impotence -- up to 7.8 percent
  • A decreased libido (sex drive) -- up to 5.9 percent
  • Breast tenderness and enlargement -- up to 2.8 percent
  • Dizziness -- up to 1.7 percent.
(Click Jalyn Sexual Side Effects to learn more about the sexual side effects associated with using this medicine.)

Final Thoughts

You may experience some or none of the side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have problems with a medicine that you have never tried.
Therefore, make sure to let your healthcare provider know if you develop any side effects while taking dutasteride/tamsulosin or if something "just does not seem right." While it may not be related to the medication, your healthcare provider will be able to diagnose and treat the problem.
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Dutasteride/Tamsulosin Drug Information

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