What you need to know

• Testosterone replacement therapy is for men with both symptoms of low testosterone and consistently low blood levels — not for vague tiredness, low mood, or “feeling older” without confirmed deficiency.
• Benign prostatic hyperplasia (an enlarged prostate) causes urinary symptoms in many men over 50. Two main classes of medication treat it — alpha blockers, which work quickly, and 5-alpha reductase inhibitors, which shrink the prostate over months.
• Both areas are over-marketed and over-prescribed. The right starting point is a real diagnosis with appropriate testing — not a symptom checklist on a clinic’s website.

Two of the most common medication conversations in men’s health are testosterone therapy and treatment for an enlarged prostate. Both involve real conditions with real treatments, and both have been heavily marketed in ways that can blur the line between appropriate use and unnecessary prescribing. This article walks through what each one is actually for, how the medications work, and what to know going in.

It does not cover everything in men’s health — erectile dysfunction, prostate cancer treatment, and infertility evaluation are separate conversations that warrant their own pieces.

Testosterone therapy: when it’s appropriate

Testosterone naturally declines slowly with age, but most men do not become testosterone-deficient. Endocrine Society guidelines recommend diagnosing hypogonadism only in men with both symptoms and unequivocally and consistently low blood testosterone levels — not based on symptoms alone, and not based on a single low reading.

Symptoms that can suggest low testosterone include reduced libido, erectile difficulties, decreased morning erections, fatigue, depressed mood, loss of body hair, gynecomastia (breast tissue growth), and reduced muscle mass and strength. The catch is that these symptoms are non-specific and have many other causes — sleep apnea, depression, thyroid disease, medication side effects, chronic illness, and ordinary aging all overlap.

If you have symptoms suggestive of low testosterone, the right starting point is a fasting morning total testosterone level, since levels are highest in the morning and drop later in the day. If the first reading is low, it should be confirmed with a second morning measurement. Other tests usually follow — luteinizing hormone, follicle-stimulating hormone, prolactin, and sometimes pituitary imaging — to identify the cause. If general fatigue is the main symptom, it is worth ruling out the common alternative causes of always feeling tired before assuming low testosterone is the answer.

How testosterone is given

Once a diagnosis is confirmed and there are no contraindications, several formulations are available:

• Topical gels — applied daily to the shoulders, upper arms, or abdomen. Stable levels but require care to avoid transferring testosterone to partners or children through skin contact.
• Patches — applied daily, often to the back, abdomen, upper arm, or thigh.
• Injections — testosterone cypionate or enanthate, given every 1 to 2 weeks; or testosterone undecanoate, given every 10 weeks. Injections produce peaks and troughs that some men feel.
• Pellets — implanted under the skin every 3 to 6 months, with steady release.
• Oral testosterone undecanoate — newer formulation taken twice daily with food. Earlier oral testosterone preparations had liver toxicity concerns; the newer agent has improved safety but requires food for absorption.

Who should not take testosterone

Testosterone therapy is generally not started in men with active prostate or breast cancer, a confirmed prostate nodule that has not been worked up, an elevated PSA above the workup threshold, untreated severe obstructive sleep apnea, recent heart attack or stroke (within 6 months), uncontrolled heart failure, severe lower urinary tract symptoms, abnormally elevated red blood cell counts, or men actively trying to conceive — testosterone therapy suppresses sperm production and is not a treatment for low testosterone in someone who wants children in the near term.

Monitoring on testosterone therapy

Once started, testosterone levels are typically rechecked at 3 to 6 months, with the goal being mid-normal range during therapy. Hematocrit (red blood cell concentration) is also tracked, because testosterone can raise it; if it rises too high, dose reduction or temporary discontinuation may be needed. PSA and a digital rectal exam are checked at baseline and at 3 to 12 months, then by standard prostate cancer screening guidelines after that. Symptoms of obstructive sleep apnea should be re-evaluated, since testosterone therapy can worsen it.

Prostate medications: managing benign prostatic hyperplasia (BPH)

BPH is a non-cancerous enlargement of the prostate gland that becomes increasingly common after age 50. The growing prostate squeezes the urethra and changes how the bladder empties, producing a familiar set of symptoms.

• Slow or weak urinary stream
• Difficulty starting urination, or stopping and starting
• Frequent urination, particularly at night (nocturia)
• Urgency — a sudden, hard-to-defer need to urinate
• Sense of incomplete emptying after urinating

BPH is not the same as prostate cancer, and treating BPH does not treat or prevent cancer. The two conditions can coexist, which is one reason a clinical evaluation matters before assuming new urinary symptoms are “just” BPH.

Watchful waiting and lifestyle measures

Mild symptoms often need no medication at all. Limiting fluids in the few hours before bedtime, reducing caffeine and alcohol (both irritate the bladder), avoiding decongestants and antihistamines that can worsen retention, and treating constipation can meaningfully improve symptoms for many men. The American Urological Association Symptom Index, a quick questionnaire, helps quantify how bothersome symptoms are and guides whether to start treatment.

Alpha blockers

Alpha blockers are usually first-line medical treatment for moderate-to-severe BPH symptoms. They relax smooth muscle in the prostate and bladder neck, improving urinary flow within days to weeks. The most commonly used are tamsulosin (Flomax), alfuzosin (Uroxatral), silodosin (Rapaflo), doxazosin (Cardura), and terazosin (Hytrin). Tamsulosin and alfuzosin are more selective for the prostate and tend to cause less drop in blood pressure than the older agents.

Common side effects include dizziness (especially when standing up quickly), nasal congestion, and retrograde ejaculation — where semen goes backward into the bladder rather than forward. Retrograde ejaculation is harmless and reverses if the medication is stopped, but it can be unsettling if no one warns you about it. Anyone planning cataract surgery should also tell the eye surgeon they take an alpha blocker, because it can affect surgical technique.

5-alpha reductase inhibitors

Finasteride (Proscar) and dutasteride (Avodart) work by blocking conversion of testosterone to dihydrotestosterone (DHT), the form most active in the prostate. They actually shrink the prostate by about 20 to 30% over 6 to 12 months and are most effective in men with significantly enlarged prostates. They take longer to work than alpha blockers but reduce the long-term risk of urinary retention and the need for prostate surgery.

Side effects include reduced libido, erectile difficulties, ejaculatory changes, and rare breast tenderness or growth. They also lower PSA levels by roughly half, which is important for prostate cancer screening — your provider will adjust how PSA is interpreted while you are on these medications. Finasteride is also used at a lower dose for male pattern hair loss, so it can show up in either context.

Combination therapy and other options

For men with both moderate-to-severe symptoms and a significantly enlarged prostate, the combination of an alpha blocker and a 5-alpha reductase inhibitor works better than either alone for slowing disease progression. Combination products (such as dutasteride/tamsulosin) simplify the regimen.

Two other medication options are worth knowing. Tadalafil 5 mg daily (a PDE5 inhibitor more commonly known for treating erectile dysfunction) is also FDA-approved for BPH symptoms and can address both at once. Mirabegron and similar bladder-relaxing medications can be added for men whose dominant symptoms are urgency and frequency rather than weak stream.

When medications are not enough, several minimally invasive procedures and traditional surgeries are available — the choice depends on prostate size, symptom severity, and other health considerations.

When to see a doctor

Talk to a clinician if you have symptoms suggestive of low testosterone (particularly reduced libido, fatigue, or sexual difficulties) and want them properly evaluated, rather than starting treatment based on a quick online questionnaire or a clinic that does not check appropriate baseline labs.

For urinary symptoms, see a clinician if you have a slow stream, frequent nighttime urination, urgency, or a sense of incomplete emptying that is bothering you. New onset of these symptoms also warrants evaluation to rule out other causes — bladder stones, infection, neurologic conditions, or, less commonly, prostate cancer.

Seek urgent care for sudden inability to urinate (acute urinary retention), blood in the urine, severe pain in the lower abdomen or back, or fever with urinary symptoms. These are not BPH on their own and need same-day evaluation.

Frequently asked questions