Indicated for the treatment of signs and symptoms of benign prostatic hyperplasia (BPH) in adults only.
Silodosin is a selective antagonist of post-synaptic alpha-1 adrenoreceptors, which are located in the human prostate, bladder base, bladder neck, prostatic capsule, and prostatic urethra. Blockade of these alpha-1 adrenoreceptors can cause smooth muscle in these tissues to relax, resulting in an improvement in urine flow and a reduction in BPH symptoms.
8 mg capsules taken orally once daily with a meal.
Patients with severe renal impairment [Creatinine Clearance (CCr< 30 mL/min)]. Patients with severe hepatic impairment (Child-Pugh score > 10). Concomitant administration with strong Cytochrome P450 3A4 (CYP3A4) inhibitors. Patients with a history of hypersensitivity to silodosin or any of the ingredients.
Postural hypotension, with or without symptoms (e.g., dizziness), may develop when beginning Silodosin treatment. In patients with moderate renal impairment, Silodosin dose should be reduced to 4 mg once daily. Should not be used in combination with other alpha-blockers. Inform patients planning cataract surgery to notify their ophthalmologist that they are taking Silodosin because of the possibility of Intraoperative Floppy Iris Syndrome (IFIS)
Pregnancy Category B. AVAPROST is not indicated for use in women. Avaprost is not indicated for use in pediatric patients. Safety and effectiveness in pediatric patients have not been established.
Strong P-glycoprotein inhibitors (e.g. cyclosporine): Co-administration may increase plasma silodosin concentration. Concomitant use is not recommended. Alpha blockers: Interactions involving concomitant use have not been determined. However, due to expected interactions, concomitant use is not recommended. Concomitant use of PDE5 inhibitors (e.g. sildenafil) with alpha-blockers can potentially cause symptomatic hypotension.
The most common adverse reactions include retrograde ejaculation, dizziness, diarrhea, orthostatic hypotension, headache, nasopharyngitis, and nasal congestion.