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- Difficulty achieving or maintaining an erection (impotence)
- Decreased sex drive
- Ejaculation disorders, such as decreased amount of semen produced or decreased sperm count
- Breast enlargement or tenderness
- Allergic reactions such as rash, itching or localised swelling
The side effects listed above may not include all of the side effects reported by the drug's manufacturer.
How can this medicine affect other medicines?
It is important to tell your doctor or pharmacist what medicines you are already taking, including those bought without a prescription and herbal medicines, before you start treatment with this medicine. Similarly, check with your doctor or pharmacist before taking any new medicines while taking this one, to ensure that the combination is safe.
The following medicines may increase the level of dutasteride in the blood by interfering with its breakdown by the body:
- diltiazem
- indinavir
- itraconazole
- ketoconazole taken by mouth
- nefazodone
- ritonavir
- verapamil.
Let your doctor know if you experience any new or increased side effects if you are taking any of these medicines in combination with dutasteride. Your doctor may ask you to take the dutasteride less frequently to resolve this.
Other medicines containing the same active ingredient
There are currently no other medicines available in the UK that contain dutasteride as the active ingredient.
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