Silodosin 8mg-Dutasteride 0.5mg

Silodosin 8mg-Dutasteride 0.5mg – Quick Overview

Silodosin 8mg-Dutasteride 0.5mg is a prescription combination capsule for benign prostatic hyperplasia (BPH), pairing an alpha-1 blocker (silodosin) with a 5-alpha reductase inhibitor (dutasteride). It relieves urinary symptoms quickly while gradually shrinking the enlarged prostate. Silodosin relaxes prostate and bladder-neck muscles; dutasteride blocks the hormone driving prostate growth. This fixed-dose combination capsule is not MHRA-licensed and is not available through UK pharmacies.

Medical Supervision & Regulatory Status

Silodosin 8mg-Dutasteride 0.5mg requires a prescription in the countries where it’s manufactured and sold. It is not licensed by the UK’s Medicines and Healthcare products Regulatory Agency (MHRA) as a fixed-dose combination and cannot be legally dispensed by UK community pharmacies or through the NHS. In the UK, the individual components are separately licensed: silodosin as Urorec and dutasteride as Avodart, both MHRA-approved for BPH and available as separate prescriptions that a GP or urologist may co-prescribe. Supervision matters because both ingredients carry blood pressure, sexual function, and hormonal side effects requiring monitoring.

Clinical Context

Benign prostatic hyperplasia is a common, non-cancerous enlargement of the prostate that develops with age and can cause difficulty starting urination, a weak stream, frequent nighttime urination, and incomplete bladder emptying. These symptoms have two underlying drivers: tight muscle tone around the urethra and physical enlargement of prostate tissue.

Treating only one driver often gives incomplete relief — an alpha-blocker alone helps flow but doesn’t shrink the gland, while a 5-alpha reductase inhibitor alone shrinks the gland but takes months to help symptoms. Combination therapy targets both mechanisms together, which is why UK urology guidance (e.g. NICE) supports combined alpha-blocker and 5-alpha reductase inhibitor therapy for appropriate patients, typically prescribed as separate licensed products.

Within BPH management, this combination generally fits as treatment for men with moderate-to-severe symptoms and an enlarged prostate who need both fast symptom relief and long-term disease control, rather than mild cases that might respond to a single agent or watchful waiting.

How Silodosin 8mg-Dutasteride 0.5mg Works

Silodosin belongs to the alpha-1 adrenergic receptor blocker class, selective for the alpha-1A receptor subtype found in the prostate and bladder neck. It relaxes smooth muscle in these tissues, easing urinary flow within days.

Dutasteride belongs to the 5-alpha reductase inhibitor class. It blocks both type-1 and type-2 forms of the enzyme that converts testosterone into dihydrotestosterone (DHT), the hormone primarily responsible for prostate tissue growth, leading to gradual prostate shrinkage over months.

Together, the combination addresses both the immediate muscle-tension component and the longer-term tissue-growth component of BPH, which is the rationale for co-prescribing them rather than using either agent alone.

What is Silodosin 8mg-Dutasteride 0.5mg?

• Drug Class: Alpha-1 adrenergic blocker (silodosin) + 5-alpha reductase inhibitor (dutasteride)
• Active Ingredients: Silodosin 8 mg; Dutasteride 0.5 mg
• Mechanism: Silodosin relaxes prostate/bladder-neck muscle; dutasteride blocks DHT production to shrink prostate tissue.
• Form: Oral capsule
• Dosing Frequency: Once daily, typically with food
• Regulatory Status: Not MHRA-licensed as a fixed-dose combination; individual ingredients are MHRA-approved separately (Urorec, Avodart)

Uses / Indications

• Benign prostatic hyperplasia (BPH): Relieves urinary symptoms — weak stream, urgency, frequent urination — and reduces prostate size over time in adult men with an enlarged prostate.
• Reduction of acute urinary retention risk: May lower the likelihood of complete urinary blockage and reduce the eventual need for BPH surgery with long-term use.

How to Use / Dosage

Take one capsule daily, generally with food to improve absorption and reduce stomach upset, and swallow it whole without crushing or chewing. Your doctor determines dosing based on prostate size, symptom severity, and kidney/liver function — do not adjust the dose yourself. If a dose is missed, take it when remembered unless it’s near the next scheduled dose, in which case skip it. Do not stop this medication without medical advice, since urinary symptoms and prostate size can worsen again, and dutasteride’s effects on prostate size reverse once stopped.

Side Effects

Most men tolerate this combination reasonably well, and side effects often lessen as the body adjusts.

Common side effects include dizziness, lightheadedness, retrograde or decreased ejaculation, reduced libido, erectile dysfunction, and breast tenderness or enlargement.

Serious side effects are less common but can include significant drops in blood pressure on standing, prolonged or painful erection, severe allergic reaction, liver enzyme changes, and mood changes including depression.

Emergency Warning Signs — seek immediate medical care if you experience:

• Fainting or severe dizziness upon standing
• Swelling of the face, lips, tongue, or throat, or difficulty breathing
• An erection lasting longer than 4 hours
• Yellowing of the skin or eyes
• Severe skin rash or blistering
• Sudden vision changes, particularly during cataract surgery

Warnings & Precautions

This combination is contraindicated in patients with severe liver impairment, known hypersensitivity to silodosin, dutasteride, or other 5-alpha reductase inhibitors/alpha-blockers, and is never used in women or children. It should be used cautiously in patients with a history of low blood pressure or fainting, since silodosin can cause orthostatic hypotension, especially when starting treatment or combining with blood pressure medications. Patients planning cataract surgery should inform their ophthalmologist, as alpha-blockers are linked to intraoperative floppy iris syndrome.

Drug interactions are specific: silodosin should not be combined with strong CYP3A4 inhibitors (such as ketoconazole, itraconazole, or ritonavir) due to increased blood levels and hypotension risk, and combining it with other alpha-blockers, blood pressure medications, or erectile dysfunction medicines (sildenafil, tadalafil) increases the risk of significant blood pressure drops. Dutasteride can raise warfarin levels and interacts with other CYP3A4-affecting drugs; it also lowers PSA (prostate-specific antigen) test results by roughly 50%, which must be factored into prostate cancer screening — relevant to NHS PSA monitoring pathways. Dutasteride is absorbed through skin, so pregnant women should avoid handling leaking or broken capsules due to fetal risk. This combination is not intended for use in women or pediatric patients under any circumstance, and periodic monitoring of blood pressure, liver function, and PSA levels is recommended with ongoing use.

Who Should Not Use This Medication

• Women and children (contraindicated in all cases)
• Patients with severe hepatic impairment
• Anyone with known hypersensitivity to silodosin, dutasteride, or related drug classes
• Patients with a history of severe orthostatic hypotension or fainting
• Men scheduled for cataract surgery who haven’t informed their surgeon
• Patients taking strong CYP3A4 inhibitors without medical clearance

Storage Instructions

Store capsules at room temperature, away from direct light and moisture. Keep in the original packaging to prevent accidental exposure, particularly by women who may be or could become pregnant. Store out of reach and sight of children and pets, and dispose of unused capsules through a UK pharmacy take-back scheme rather than household waste.

Frequently Asked Questions

Is Silodosin 8mg-Dutasteride 0.5mg available in the UK?

No, this fixed-dose combination is not MHRA-licensed and is not sold through UK pharmacies or the NHS. The individual ingredients are MHRA-approved separately (Urorec and Avodart) and can be co-prescribed by a UK doctor.

Does Silodosin 8mg-Dutasteride 0.5mg require a prescription?

Yes, a prescription is required everywhere it’s legally sold. A doctor must evaluate prostate size and symptoms and confirm there are no contraindications like liver disease.

How long does it take to work?

Silodosin often eases urinary symptoms within a few days, while dutasteride’s prostate-shrinking effect typically takes three to six months to become fully apparent. Full benefit requires consistent daily use.

Is it safe to stop this medication suddenly?

Stopping is not dangerous in an emergency sense, but symptoms and prostate size can gradually return to baseline. Any changes should be discussed with your GP or urologist first.

What if I miss a dose?

Take the missed dose as soon as you remember, unless it’s almost time for the next one — then skip it and resume your normal schedule. Do not double the dose.

Can it interact with other medications?

Yes, particularly with strong CYP3A4 inhibitors, other blood pressure or erectile dysfunction medications, and warfarin, which can increase side effect or bleeding risk. Share your full medication list with your GP or pharmacist.

What is the cost without insurance or NHS prescription?

The cost depends on the seller, brand availability, and pack size, and may also vary by location and available discounts. As this fixed combination isn’t sold through UK pharmacies, NHS-prescribed patients would instead be charged the standard NHS prescription rate for each separately licensed component.

Resources

• MHRA/electronic Medicines Compendium (emc) – Urorec (silodosin) Summary of Product Characteristics: https://www.medicines.org.uk/emc/product/2313
• MHRA/electronic Medicines Compendium (emc) – Avodart (dutasteride) Summary of Product Characteristics: https://www.medicines.org.uk/emc/product/759
• NICE Guidance – Lower Urinary Tract Symptoms in Men: Management: https://www.nice.org.uk/guidance/cg97

Medical Disclaimer

This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Consult a qualified specialist or physician before using Silodosin 8mg-Dutasteride 0.5mg.