Finasteride (GU)
Proscar / Finasteride is a treatment for Benign Prostatic Hyperplasia or BPH. It contains an active ingredient that works by inhibiting the function of an enzyme in the body. This enzyme is responsible for the transformation of testosterone into dihydrotestosterone, a process that can lead to an enlarged prostate. Proscar (finasteride), a synthetic 4-azasteroid compound, is a specific 5α-reductase inhibitor of type II, an intracellular enzyme that metabolizes testosterone into a more powerful androgen, the dihydrotestosterone (DHT). In benign prostatic hyperplasia (BPH), an enlarged prostate depends on the conversion of testosterone to DHT within the prostate.
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| Pack | Price (£) | ||
|---|---|---|---|
| Finasteride GU (Generic) | 5mg | 28 Tablets | 24.00 |
| Finasteride GU (Generic) | 5mg | 56 Tablets | 43.00 |
| Finasteride GU (Generic) | 5mg | 84 Tablets | 60.00 |
| Proscar | 5mg | 28 Tablets | 34.00 |
| Proscar | 5mg | 56 Tablets | 56.00 |
| Proscar | 5mg | 84 Tablets | 84.00 |
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Finasteride (Proscar / Finasteride GU) Tablets for Enlarged Prostate and BPH Treatment
Finasteride (Proscar / Finasteride GU) tablets are used in men to treat symptoms caused by an enlarged prostate, also known as benign prostatic hyperplasia or BPH. Finasteride works at the hormonal level to reduce prostate size over time, which improves urinary flow and eases ongoing urinary symptoms. By targeting the underlying cause of prostate enlargement rather than just the symptoms, Finasteride tablets support long-term prostate health and BPH management.
Men with BPH often experience slow urine flow, difficulty starting urination, frequent night-time trips to the toilet, and a feeling that the bladder does not empty fully. You can request Finasteride tablets online from Pharmacy Planet following a short and free consultation with one of our UK prescribers, with discreet home delivery.
What Are Finasteride (Proscar / Finasteride GU) Tablets?
Finasteride (Proscar / Finasteride GU) tablets contain finasteride, a medicine that belongs to a group called 5-alpha reductase inhibitors. This type of medicine directly reduces prostate size by blocking the formation of dihydrotestosterone, also known as DHT. An enlarged prostate depends on DHT to continue growing. By lowering DHT levels within the prostate, Finasteride tablets gradually shrink the prostate gland. This reduces pressure on the urethra and improves urinary symptoms linked to BPH.
Finasteride tablets are prescribed for men with urinary symptoms including frequent need to pass urine (including at night), difficulty starting urination, weak or interrupted urine stream, dribbling after passing urine, and a sensation that the bladder does not empty fully. Note: Finasteride tablets are prescribed only for men and are not suitable for women or children.
How Do Finasteride Tablets Work?
Finasteride tablets work by blocking the action of an enzyme called 5-alpha reductase type II. This enzyme converts testosterone into dihydrotestosterone, a stronger hormone that drives prostate growth. When DHT levels fall, the prostate gradually reduces in size. As the prostate shrinks, pressure on the urethra decreases, allowing urine to flow more freely. This improves urinary flow, reduces straining, and supports better bladder emptying. Finasteride tablets do not act on androgen receptors and do not affect testosterone production elsewhere in the body.
How to Use Finasteride Tablets?
Always take Finasteride tablets exactly as prescribed by your pharmacist. Swallow the tablet whole with water, with or without food. Do not crush or break the tablets.
- Take one Finasteride tablet at the same time each day.
- Continue taking the medicine daily, even if symptoms change slowly.
- Read the patient information leaflet before starting treatment.
The usual dose is one 5 mg Finasteride tablet once daily. Since prostate enlargement develops slowly, it may take 3 to 6 months of continuous treatment before noticeable improvement occurs. Long-term use is often required to maintain benefits.
Who Can Use Finasteride Tablets?
Finasteride tablets may be suitable for:
- Men diagnosed with benign prostatic hyperplasia.
- Men with confirmed prostate enlargement causing urinary symptoms.
- Men requiring long-term prostate reduction therapy.
Finasteride tablets are not suitable for:
- Women or anyone under 18 years of age.
- Anyone allergic to finasteride or tablet ingredients.
- Women who are pregnant or may become pregnant, due to the risk to an unborn male baby.
If your sexual partner is pregnant or may become pregnant, exposure to crushed or broken tablets and contact with semen should be avoided.
Possible Side Effects of Finasteride Tablets
Like all medicines, Finasteride tablets can cause side effects, although many men experience none or only mild effects.
Common Side Effects (may affect up to 1 in 10 men):
- Reduced sex drive, difficulty achieving or maintaining an erection, reduced volume of semen during ejaculation
Uncommon Side Effects (may affect up to 1 in 100 men):
- Breast tenderness or swelling, ejaculation problems, skin rash or itching
Rare or Reported Side Effects:
- Mood changes including depression or anxiety, allergic reactions (swelling of lips/face/tongue/throat), testicular pain or blood in semen, changes in liver enzyme levels
Seek medical advice immediately if you notice signs of an allergic reaction, persistent mood changes, or breast lumps.
Why Do People Choose Finasteride Tablets?
Finasteride tablets are commonly chosen because they reduce prostate size at the source of BPH, improve urinary flow over time, reduce frequent urination and night-time symptoms, lower the risk of urinary retention, and reduce the likelihood of needing prostate surgery. For men seeking a long-term solution for enlarged prostate management, Finasteride tablets offer a clinically proven option.
Buy Finasteride Tablets Online from Pharmacy Planet
You can buy Finasteride tablets online from Pharmacy Planet, with a short UK consultation and discreet delivery.
- Complete a short online consultation about your symptoms and health.
- One of our UK prescribers reviews your answers to confirm suitability.
- If approved, your Finasteride tablets are dispensed and delivered directly to your door.
Finasteride works at the hormonal level to reduce prostate size over time, improving urinary flow and easing ongoing urinary symptoms. By targeting the underlying cause of prostate enlargement rather than just the symptoms, it supports long-term prostate health and BPH management.
A 5-alpha reductase inhibitor that blocks DHT formation, gradually shrinking the prostate gland. Prescribed for men with frequent urination (including at night), difficulty starting, weak/interrupted stream, post-void dribbling, or incomplete bladder emptying. For men only.
Finasteride blocks 5-alpha reductase type II, which converts testosterone into DHT — the hormone that drives prostate growth. As DHT levels fall, the prostate shrinks, reducing pressure on the urethra and allowing freer urine flow. Does not affect testosterone production or androgen receptors elsewhere in the body.
One 5mg tablet once daily, at the same time each day. Swallow whole with water — do not crush or break. Can be taken with or without food. Treatment for 3–6 months is usually needed before noticeable improvement. Long-term use required to maintain benefits.
Suitable for men with diagnosed BPH and confirmed prostate enlargement causing urinary symptoms requiring long-term prostate reduction therapy.
Not suitable for women/under 18, those allergic to finasteride, or women who are pregnant/may become pregnant. Avoid exposure to crushed/broken tablets and contact with semen if partner is pregnant.
Common: Reduced sex drive, erectile difficulties, reduced semen volume
Uncommon: Breast tenderness/swelling, ejaculation problems, skin rash/itching
Rare: Mood changes (depression/anxiety), allergic reactions, testicular pain, blood in semen, liver enzyme changes
Seek immediate medical advice for allergic reactions, persistent mood changes, or breast lumps.
Finasteride reduces prostate size at the source of BPH, improves urinary flow over time, reduces frequent/night-time urination, lowers risk of urinary retention, and reduces likelihood of needing prostate surgery — a clinically proven long-term option.
You can buy Finasteride tablets online from Pharmacy Planet with a short UK consultation and discreet delivery.
- Complete a short online consultation about your symptoms and health.
- One of our UK prescribers reviews your answers to confirm suitability.
- If approved, your Finasteride tablets are dispensed and delivered directly to your door.
Finasteride tablets work slowly because they reduce prostate size over time. Most men need to take them for around three to six months before noticing clear improvement in urine flow or bladder symptoms. Continued daily use is important for full benefit.
Finasteride reduces prostate size while you are taking it. If you stop treatment, hormone levels return to normal, and the prostate may start to enlarge again. Long-term use is usually recommended to maintain prostate reduction.
No, Finasteride does not work immediately. Urinary flow improves gradually as the prostate becomes smaller. Some men notice changes earlier, but full improvement usually takes several months.
Finasteride tablets reduce the risk of urinary retention and lower the chance of needing prostate surgery, especially when taken long-term. It is often prescribed to slow disease progression rather than provide instant symptom relief.
Yes, Finasteride is often taken alongside other prostate medicines such as alpha blockers if needed. Your prescriber will decide whether combination treatment is suitable based on your symptoms and medical history.
Finasteride does not reduce testosterone production. It blocks the conversion of testosterone into DHT, the hormone that causes prostate growth. Testosterone levels in the body remain largely unchanged.
Yes, you can buy Finasteride tablets online from Pharmacy Planet after completing a short consultation. A UK prescriber reviews your answers to ensure the treatment is suitable before approval and delivery.
Some men experience reduced sex drive or erection problems while taking Finasteride. These effects are not experienced by everyone and may improve with time or after stopping treatment. Always discuss concerns with your prescriber.
No, Finasteride tablets are only for men. Women, especially those who are pregnant or may become pregnant, must not use Finasteride or handle broken tablets due to the risk to an unborn baby.

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Authored on : April 23 2026
HARMINDER ‘HARMY’ KAUR
BSc(hons) Pharmacy
GPhC Number: 2061107

Reviewed on : April 23 2026
GURDEV SEHMI
BSc Pharm, MRPharmS, Independent Prescriber, Superintendent Pharmacist, Clinical Lead
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