You should not use silodosin if you have severe kidney or liver disease, or if you are also using ketoconazole (Nizoral), itraconazole (Sporanox), or ritonavir (Norvir).
Before taking silodosin, tell your doctor if you have kidney or liver disease, or prostate cancer.
Also tell your doctor about all other medications you use, especially other prostate medications, antibiotics, HIV/AIDS medications, or heart or blood pressure medications.
Silodosin should be taken with food to reduce the chance of side effects.
Silodosin can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.
Silodosin can affect the pupils of your eyes during cataract surgery. If you have cataract surgery while you are taking silodosin, or even long after you stop taking it, tell the surgeon ahead of time that you have taken this medication. Do not stop using silodosin before surgery unless your surgeon tells you to.