Silodosin
Silodosin
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Silodosin

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Silodosin

Silodosin, sold under the brand name Urief among others, is a medication used for the symptomatic treatment of benign prostatic hyperplasia. It acts as an alpha-1 adrenergic receptor antagonist.

The most common side effect is a reduction in the amount of semen released during ejaculation.

Silodosin is indicated for the treatment of the signs and symptoms of benign prostatic hyperplasia.

Silodosin is contraindicated for people with kidney impairment or severe liver impairment.

According to European labels, silodosin has no contraindications apart from known hypersensitivity. Another source names recurring urinary retention, recurring urinary infections, uncontrolled macrohematuria, bladder stones, hydronephrosis, combination with other α1-antagonists or dopamine agonists, and severe renal or hepatic impairment as contraindications. According to the US Food and Drug Administration (FDA), silodosin is contraindicated with paxlovid, a drug used in treating COVID-19.

The most common adverse effect is loss of seminal emission. This seems to be caused by silodosin's high selectivity for α1A receptors.

Intraoperative floppy iris syndrome occurs in some people taking alpha adrenoreceptor antagonists and may lead to complications during cataract surgery.

Other common adverse effects (in more than 1% of patients) are dizziness, orthostatic hypotension, diarrhea, and clogged nose. Less common (0.1–1%) are tachycardia (fast heartbeat), dry mouth, nausea, skin reactions, and erectile dysfunction. Hypersensitivity reactions occur in fewer than 0.01% of patients. There have been reports about intraoperative floppy iris syndrome during cataract extractions.

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