Alternatives to tamsulosin: alfuzosin, silodosin, dutasteride

The most used alternative to tamsulosin is another alpha blocker: alfuzosin or silodosin. If no alpha blocker helps enough, a 5-alpha-reductase inhibitor such as finasteride or dutasteride comes into view, or a combination. They differ mainly in the risk of ejaculation problems and in their effect on your PSA.

What strikes me about men who want to switch: they ask for "something else" without naming why. And that why entirely determines which drug makes sense.

So here they are side by side, with the two questions that shape the conversation.

What alternatives to tamsulosin exist?

There are three routes. Another alpha blocker with a different side-effect profile, such as alfuzosin or silodosin. A 5-alpha-reductase inhibitor that shrinks the prostate, such as finasteride or dutasteride. Or a combination tablet bringing two actions together. Procedures also exist.

Which route fits depends on what is going wrong.

With side effects you cannot tolerate, you usually stay in the same class and change agent. With too little effect you move to another class or a combination. That is a different conversation with a different trade-off.

The non-drug routes, from watchful waiting to surgery, are in treatment options for an enlarged prostate.

What is the difference between alfuzosin and tamsulosin?

Both are alpha blockers that relax the muscle around prostate and bladder neck. Tamsulosin targets the alpha-1A receptor more strongly, alfuzosin is less selective. Practically that means a lower chance of ejaculation problems with alfuzosin, and possibly slightly more blood-pressure-related side effects.

That selectivity is the whole reason these drugs feel different.

Alpha-1A receptors sit close to the prostate and the seminal vesicles. Block them selectively and you act more precisely on the urinary symptoms, while hitting the ejaculation mechanism harder.

There is another difference few men know about. Cataract surgery can meet a floppy iris, and in 2014 Chang and colleagues compared its severity with tamsulosin against alfuzosin (PMID 24314842). The risk profiles were not equal. So always tell your eye surgeon which alpha blocker you take.

What are the side effects of silodosin?

Silodosin is the most alpha-1A-selective alpha blocker, and you see that in its side effects: ejaculation problems are most common with this drug. Beyond that the same kinds of complaints apply as with tamsulosin, such as dizziness on standing and a blocked nose.

That strong effect on ejaculation is well studied, and in a striking way.

A 2008 Japanese study used colour Doppler ultrasonography to see what actually happens during ejaculation on silodosin (PMID 18721206). A 2012 study in BMC Urology examined the same disorder in men taking silodosin for prostatic enlargement (PMID 23082785). In 2025 a systematic review with network meta-analysis on silodosin for urinary symptoms appeared (PMID 41346266).

Worth knowing: the effect is not harmful and resolves for most men after stopping. It is why silodosin is rarely a first choice for a man who wants children.

Which drug carries the lowest ejaculation risk?

Among the alpha blockers alfuzosin generally carries the lowest risk, tamsulosin sits in between, and silodosin carries the highest. The 5-alpha-reductase inhibitors behave differently: they mainly lower libido and ejaculate volume, and they halve your PSA. Here it is side by side.

Read the table on two columns. If your problem is ejaculation, look at column three. If you need to interpret a PSA result, look at column four.

Column three rests on the 2014 systematic review and meta-analysis by Gacci and colleagues, which compared the effects of BPH drugs on ejaculatory function (PMID 24708055).

More on what men actually notice is in tamsulosin side effects in men and ejaculation: how it works and what is normal.

When do you choose a 5-ARI over an alpha blocker?

A 5-alpha-reductase inhibitor comes into view mainly with a clearly enlarged prostate, because it shrinks glandular tissue. It works slowly, three to six months, and it lowers your PSA. An alpha blocker works fast but does not change the prostate itself.

That difference in speed is why the two classes are often combined.

The CombAT study compared dutasteride, tamsulosin and the combination over four years (PMID 21332630). The pattern: the alpha blocker delivers immediate relief, the 5-ARI builds over years.

What the PSA halving means for reading your result, with numbers, is in dutasteride side effects and your PSA and in finasteride experiences. You can see your own value with a PSA test.

What if no drug does enough?

Then the question is which kind of symptom remains. If urgency and frequency dominate, a drug that also acts on the bladder can make sense. If voiding itself stays difficult despite medication, procedures enter the conversation. That is a judgement for your urologist.

A concrete case shows why the question matters.

Two men aged 68 have been on 0.4 mg tamsulosin for a year. The first still has a weak stream and the feeling his bladder never empties. The second urinates fine but wakes four times a night with sudden urgency. Same drug, same year, and yet two different next steps.

On the combination that acts on the bladder we wrote Vesomni: the tamsulosin and solifenacin combination. The full overview of the drug most men start with is in tamsulosin: how it works and what your doctor checks.

What to do with this

Before your next appointment, finish one sentence: "I want to switch because ..." and fill in the real reason. Side effects, too little effect, or wanting children. Those three lead to different drugs.

Say it if ejaculation is the reason. The table above shows that this allows a targeted choice, and you start that conversation yourself.

If cataract surgery is coming up, always report which alpha blocker you take or took.

Every Caliber blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

References

• Gacci M, et al. Impact of medical treatments for male lower urinary tract symptoms due to benign prostatic hyperplasia on ejaculatory function: a systematic review and meta-analysis. J Sex Med. 2014. PMID 24708055.
• Ejaculatory dysfunction caused by the new alpha1-blocker silodosin: a preliminary study to analyze human ejaculation using color Doppler ultrasonography. Int J Urol. 2008. PMID 18721206.
• Investigation of ejaculatory disorder by silodosin in the treatment of prostatic hyperplasia. BMC Urol. 2012. PMID 23082785.
• Silodosin in treating men with BPH-associated lower urinary tract symptoms: a systematic review and network meta-analysis. Int J Surg. 2025. PMID 41346266.
• Chang DF, et al. Prospective masked comparison of intraoperative floppy iris syndrome severity with tamsulosin versus alfuzosin. Ophthalmology. 2014. PMID 24314842.
• Roehrborn CG, et al. Clinical outcomes after combined therapy with dutasteride plus tamsulosin or either monotherapy: 4-year CombAT results. BJU Int. 2011. PMID 21332630.
• Farmacotherapeutisch Kompas. Drug monographs alfuzosine, silodosine, tamsulosine. Accessed 2026. farmacotherapeutischkompas.nl.