Tadalafil for an Enlarged Prostate: The Second Approval

Lower urinary tract symptoms are the ordinary indignities: urgency, going more often, getting up at night, a stream that has lost its force, hesitancy, dribbling, the sense that the bladder has not quite emptied. They are scored on a standard questionnaire, and treatment is judged by how far that score falls.

On that measure daily tadalafil produces a real improvement — consistently better than placebo, and in the same general range as the older drugs where they have been compared directly. Men tend to notice within a few weeks.

The honest qualifier: when investigators measure urine flow itself rather than asking how men feel, tadalafil's effect is smaller than an alpha-blocker's, and in several trials it did not separate clearly from placebo on flow even while symptom scores improved. The change is real but moderate — relief, not a restored plumbing system.

Alpha-blockers, usually tamsulosin, are what most men are offered first. They work within days rather than weeks and they do more for flow. But they lower blood pressure, and dizziness on standing is the common reason men stop them; they cause retrograde ejaculation in a substantial minority, where ejaculate goes backward into the bladder rather than out; and they are associated with a complication during cataract surgery, so an ophthalmologist needs to know.

5-alpha-reductase inhibitors — finasteride, dutasteride — block the conversion of testosterone to DHT and, over months, genuinely shrink the gland. They are the right choice for a substantially enlarged prostate and the only class shown to reduce the long-term risk of urinary retention and surgery. But they are slow, half a year or more before the benefit is clear; they lower PSA, which changes how future screening is read; and they carry sexual side effects of their own, including reduced libido and erectile difficulty.

So the pattern repeats. Both established options tend to worsen sexual function. Tadalafil is the one that does not.

The man with both problems. If erections have declined and urinary symptoms have arrived together, one daily tablet treats both and neither alternative can say that — which is also the strongest case for daily over as-needed dosing, covered in daily versus as-needed. The man with urinary symptoms alone has a more even choice, and an alpha-blocker may serve him better. Combining the two is done and appears to add benefit, but it compounds the blood pressure effect and belongs to a clinician who knows the whole medication list.

Nitrates: never. Tadalafil with any nitrate — nitroglycerin in any form, isosorbide mononitrate or dinitrate, or amyl nitrite ("poppers") — can cause a severe and potentially fatal drop in blood pressure. This is an absolute contraindication, not a risk to be weighed against benefit. If you carry nitroglycerin for chest pain, this is not for you.

Alpha-blockers: additive. Both drugs lower blood pressure, and men with prostate symptoms are frequently already on an alpha-blocker. Together they can drop it far enough to cause dizziness or fainting. That can sometimes be managed, but it is a clinical decision, and your prescriber has to know about both.

The usual cautions also apply — recent heart attack or stroke, unstable angina, uncontrolled blood pressure, certain inherited retinal disorders. The hub page lists them in full.

Urinary symptoms in a man over fifty are not self-diagnosing. The same complaints come from prostate cancer, infection, bladder stones, an overactive or underactive bladder, diabetes, neurological disease, and medications already being taken. Benign prostatic hyperplasia is the most likely explanation, but "most likely" is not a diagnosis, and treating symptoms without knowing their cause can delay the diagnosis that mattered.

Assessment means a history, a symptom score, a urine test, a PSA discussion, an examination, sometimes imaging — some of which needs an in-person visit. Our clinicians will say when that is what you need rather than prescribing around it. Lab testing is where the workable part starts; all lab tests sets out what we can run.