How to Shrink an Enlarged Prostate: What Actually Works?

What Is an Enlarged Prostate?

Benign prostatic hyperplasia, or BPH , is a noncancerous enlargement of the prostate gland.

BPH is not prostate cancer, and BPH does not turn into prostate cancer.

The two conditions can coexist, however, which is why persistent urinary symptoms sometimes need a proper prostate evaluation.

According to NIDDK (National Institute of Diabetes and Digestive and Kidney Diseases) , the prostate has two main growth phases. The first occurs during puberty. A second phase begins at about age 25 and continues throughout life, with BPH becoming increasingly common later in life.

Current estimates suggest BPH affects approximately:

• 5–6% of men aged 40–64;
• and about 29–33% of men aged 65 and older.

Symptoms are unusual before age 40.

Does Every Enlarged Prostate Need to Be Shrunk?

No. This is one of the most important things I explain to patients with BPH.

It is very easy to assume that a larger prostate automatically means more severe urinary problems, but in practice that is not always true.

Some men have a fairly large prostate and only mild symptoms. Others may have a much smaller enlargement but still struggle with a weak urinary stream, difficulty starting urination, frequent nighttime urination, urgency, or the feeling that the bladder is not emptying properly.

So the treatment goal is not simply:

“Make the prostate as small as possible.”

What matters more is how the prostate is affecting you, how well your bladder is functioning, and whether there is any risk of complications.

When I look at treatment options, I consider several things together:

• How bothersome your symptoms are and whether they are affecting sleep, daily activities or quality of life;
• the actual prostate volume and whether the gland is clearly enlarged;
• your urine-flow rate, which helps show how easily urine is passing;
• post-void residual urine, meaning how much urine remains in the bladder after you finish urinating;
• your risk of acute urinary retention, where the bladder suddenly becomes unable to empty;
• whether complications are developing, such as recurrent urinary infections, bladder stones, significant retention or effects on the kidneys;
• your other medical conditions and medications;
• and, very importantly, your own preferences about treatment.

For example, if a man has a large prostate but is urinating reasonably well, has little residual urine and is not particularly bothered by his symptoms, immediate prostate-shrinking treatment may not always be necessary.

On the other hand, if another patient has progressive symptoms, poor bladder emptying or a higher risk of urinary retention, reducing prostate size may become much more important.

This is why BPH treatment should be individualized. The ultrasound measurement is useful, but it is only one part of the picture.

I usually tell patients: we treat the man, not just the prostate measurement. The best treatment is the one that improves symptoms, protects bladder and kidney function when necessary, reduces future risk, and matches the patient’s priorities.

Which BPH Treatments Actually Shrink the Prostate?

Finasteride and Dutasteride: Medicines That Can Shrink the Prostate

The main medications that actually reduce prostate volume are called 5-alpha-reductase inhibitors (5-ARIs).

The two commonly used medicines are:

• finasteride;
• dutasteride.

These medicines reduce the conversion of testosterone to dihydrotestosterone (DHT), an androgen that plays an important role in prostate growth.

Current EAU (European Association of Urology) guidance reports that 5-ARIs can decrease prostate volume by approximately 18–28%.

The effect develops slowly. Meaningful clinical benefit generally takes several months rather than several days.

These medicines are particularly useful when a man has:

• moderate-to-severe urinary symptoms;
• a larger prostate;
• and an increased risk that BPH will progress.

Learn more in our BPH Medications guide .

Are There Any Risks With Finasteride or Dutasteride?

These are effective medicines, but they are not appropriate for every patient.

Possible adverse effects include:

• reduced sexual desire;
• erectile dysfunction;
• ejaculatory changes;
• breast tenderness or enlargement in some men;
• and other less common adverse effects.

They also lower PSA levels substantially, which is important when interpreting future PSA tests .

Current European guidance reports that PSA commonly decreases by about 50% after six to twelve months of treatment.

Does Tamsulosin Shrink an Enlarged Prostate?

No. This is an important distinction because tamsulosin can improve urinary symptoms quite well, but it does not actually make the prostate smaller.

Tamsulosin belongs to a group of medicines called alpha-1 blockers. Other medications in this group include:

• alfuzosin;
• silodosin;
• doxazosin;
• and terazosin.

These medicines work by relaxing the smooth muscle in and around the prostate and bladder outlet. When that area relaxes, urine can pass more easily, which is why many men notice a stronger stream, less straining, and easier urination.

I usually explain it to patients this way: tamsulosin opens the passage, but it does not shrink the gland.

This is also why tamsulosin often begins to help relatively quickly, sometimes within days. Its effect comes from reducing resistance around the urinary outlet rather than slowly changing the size of the prostate.

If the main treatment goal is to reduce prostate volume and lower the long-term risk of BPH progression, medicines such as finasteride or dutasteride may be considered in appropriately selected men because they work through a different mechanism.

So, if you are taking tamsulosin and your symptoms improve, that does not necessarily mean your prostate has become smaller. It means the medication is helping urine flow more easily through the bladder outlet.

Why Are Tamsulosin and Finasteride Sometimes Used Together?

I often explain to patients that tamsulosin and finasteride are sometimes prescribed together because they do two different jobs.

Tamsulosin is an alpha blocker. It relaxes the smooth muscle around the prostate and bladder outlet, helping urine pass more easily. Because of this, symptom relief can begin relatively quickly.

Finasteride, on the other hand, is a 5-alpha-reductase inhibitor (5-ARI). It works much more slowly by reducing the hormonal stimulation that contributes to prostate growth. Over time, it can reduce prostate volume and lower the risk of BPH progression, including the risk of acute urinary retention and the future need for surgery in appropriately selected men.

I usually describe the combination this way: tamsulosin helps you urinate better now, while finasteride works on the longer-term prostate problem.

This approach may be particularly useful for men who have:

• moderate-to-severe urinary symptoms;
• a clearly enlarged prostate;
• and a higher risk that BPH will continue to progress over time.

However, combination therapy is not simply a way to “shrink the prostate as quickly as possible.” Finasteride still takes months to produce its full effect, while tamsulosin mainly improves urinary flow without shrinking the prostate.

There is also a trade-off. Taking two medications means that a patient may experience side effects from both drug classes. Tamsulosin can cause problems such as dizziness, low blood pressure when standing and ejaculatory changes, while finasteride can cause reduced libido, erectile difficulties or changes in ejaculation in some men.

For this reason, I would not recommend combination treatment automatically for every man with BPH. The decision should depend on prostate size, symptom severity, risk of progression, other medical conditions and the patient’s own treatment priorities.

The goal is not to prescribe more medication simply because the prostate is enlarged. The goal is to choose the treatment that gives the best balance between symptom relief, long-term protection and acceptable side effects.

Are There Foods That Shrink the Prostate?

No food has been demonstrated to reliably shrink an enlarged prostate in the way that finasteride or dutasteride can.

A balanced diet remains important for general cardiovascular, metabolic and overall health.

Obesity, diabetes and low physical activity are associated with BPH risk, so maintaining good general health is worthwhile.

However, that should not be converted into claims that tomatoes, pumpkin seeds, garlic or another individual food will make an enlarged prostate disappear.

Can Saw Palmetto or Pygeum Shrink an Enlarged Prostate?

Saw Palmetto

Saw palmetto is heavily marketed for BPH, but good-quality evidence does not support promising that it shrinks the prostate.

NCCIH states that a 2023 review of 27 studies found that saw palmetto used alone provides little or no benefit for BPH symptoms.

Large NIH-funded trials also did not demonstrate better symptom control than placebo, even with higher doses.

Pygeum africanum

Evidence for Pygeum is limited.

Some older short-term studies suggest that it may improve certain urinary symptoms, but the evidence is not strong enough to say that Pygeum reliably shrinks the prostate or prevents BPH progression.

See our Natural Remedies for Enlarged Prostate evidence review.

Should You Take High-Dose Zinc to Shrink the Prostate?

No. I would remove the old recommendation to take 50–100 mg of zinc every day.

There is no established guideline recommending high-dose zinc as a way to shrink BPH.

According to the NIH Office of Dietary Supplements, the tolerable upper intake level for zinc in adults is 40 mg per day from food and supplements combined, unless a larger dose is being used medically under professional supervision.

Taking 50 mg or more for weeks can:

• interfere with copper absorption;
• cause copper deficiency;
• reduce immune function;
• lower HDL cholesterol;
• and cause nausea, vomiting or gastrointestinal symptoms.

Do Kegel Exercises Shrink the Prostate?

No.

Pelvic-floor exercises work on muscles, not prostate tissue.

They may be useful for selected urinary-control problems—for example, rehabilitation after certain prostate procedures—but they do not reduce BPH volume or remove an obstruction caused by prostate tissue.

Performing repeated contractions while urinating is also not a standard way to treat BPH.

Which Procedures Reduce or Remove Enlarged Prostate Tissue?

When symptoms remain bothersome despite medical treatment, or when BPH complications develop, a urologist may discuss procedural treatment.

Current options include:

TURP

Transurethral resection removes obstructing prostate tissue through the urethra.

HoLEP

Holmium laser enucleation removes the obstructing adenomatous prostate tissue and can be used across a broad range of prostate sizes.

GreenLight Laser

Photoselective vaporization uses laser energy to vaporize obstructing tissue.

Rezūm

Water-vapor therapy causes selected prostate tissue to undergo controlled tissue damage and gradually decrease in volume.

Aquablation

Aquablation uses a robotically controlled high-velocity water jet to remove selected prostate tissue.

UroLift

Prostatic urethral lift is different: it generally does not shrink or remove prostate tissue. Implants hold the obstructing lobes away from the urethral channel.

Learn about the differences in our BPH Surgery & Procedures guide .

Is Surgery Always the Last Resort?

Not necessarily.

Many men understandably prefer medication first, but surgery or a procedure may become the appropriate treatment when:

• medications do not control bothersome symptoms;
• side effects make medication unacceptable;
• the patient prefers a procedural solution;
• urinary retention is persistent or recurrent;
• recurrent urinary infections occur because of BPH;
• bladder stones recur;
• significant BPH-related bleeding occurs;
• or kidney function is threatened by obstruction.

Does BPH Surgery Always Cause Impotence or Sterility?

No.

Sexual side effects vary considerably according to the procedure.

Some procedures frequently change ejaculation, particularly TURP and enucleation procedures.

Erectile dysfunction can occur after BPH surgery, but it is incorrect to say that surgery routinely causes impotence.

Likewise, ejaculation and fertility considerations are not identical to erectile function.

Men who place a high priority on preserving ejaculation should discuss this explicitly with their urologist because procedure choice can affect the likelihood of ejaculatory dysfunction.

What Happens if an Enlarged Prostate Is Left Untreated?

Not every untreated enlarged prostate inevitably becomes dangerous.

Men with mild symptoms that are not very bothersome may be managed with watchful waiting and periodic follow-up.

However, BPH can progress in some men and complications may include:

• acute or chronic urinary retention;
• recurrent urinary tract infection;
• bladder stones;
• blood in the urine;
• bladder dysfunction;
• and, in severe obstruction, kidney damage.

This is why treatment should be based on symptoms and risk rather than simply trying to make every enlarged prostate smaller.

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