BPH

Silodosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). It does not shrink the prostate, but it works by relaxing the muscles in the prostate and the bladder. This helps to relieve symptoms of BPH such as difficulty in beginning the flow of urine, weak stream, and the need to urinate often or urgently (including during the middle of the night).
Silodosin belongs to a class of drugs known as alpha blockers.
Do not use this medication to treat high blood pressure.
Silodosin may cause a sudden drop in your blood pressure, which could lead to dizziness or fainting. This risk is higher when you first start taking this drug, after your doctor increases your dose, or if you restart treatment after you stop taking it. During these times, avoid situations where you may be injured if you faint.
To avoid injury from dizziness or fainting, your doctor may tell you to take your first dose of silodosin with food at bedtime so that your body can get used to its effects.

Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH). It does not shrink the prostate, but it works by relaxing the muscles in the prostate and the bladder. This helps to relieve symptoms of BPH such as difficulty in beginning the flow of urine, weak stream, and the need to urinate often or urgently (including during the middle of the night).
Tamsulosin belongs to a class of drugs known as alpha blockers.
Do not use this medication to treat high blood pressure.

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Ejaculatory dysfunction, predominantly the inability to ejaculate and decreased ejaculate volume, is associated with tamsulosin and silodosin, which are superselective α_1A-adrenergic receptor antagonists. Ejaculatory dysfunction is rare with α₁-adrenergic receptor antagonists that are not selective for the α_1A-adrenergic receptor subtype, namely alfuzosin, doxazosin, and terazosin