ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
It's also used off-label to help pass kidney stones.
What it's used for
- Enlarged prostate (BPH)
- Off-label: helping pass kidney stones
How to take it
- Take it once a day with a meal.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Little or no semen with orgasm
- Dizziness
- Stuffy nose
Call 911Fainting
Call 911An erection lasting more than 4 hours
Warnings
- Tell your eye surgeon you take it before cataract surgery.
- Stand up slowly.
- Not for people with severe kidney or liver disease.
Other medicines, foods, and alcohol
- Strong CYP3A4 blockers must not be combined.
- Other alpha blockers add to dizziness.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Not used in women.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Silodosin (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.