Medicines
Tamsulosin for BPH: How the Medicine Works
Tamsulosin for BPH is an alpha blocker that relaxes muscles in the prostate and bladder neck so urine flows more easily. MedlinePlus warns it may cause dizziness and fainting, especially when standing quickly. Tell your doctor you take it before eye surgery. Never stop it because of a supplement, and ask before combining the two.
Written by the Protoflow label deskUpdated · 4 min read
How it works01
How does tamsulosin work for BPH?
It relaxes muscles in the prostate and bladder neck. The tube opens a little, and urine passes more easily.
MedlinePlus describes tamsulosin as a BPH treatment that works this way (MedlinePlus, Tamsulosin). The AUA lists tamsulosin among the alpha blockers it offers for bothersome moderate-to-severe urinary symptoms (AUA BPH Guideline (Sandhu 2023 amendment)). Unlike finasteride, it does not shrink the gland.
Side effects02
What are the side effects of tamsulosin?
The ones MedlinePlus names are dizziness, lightheadedness and fainting.
| Issue | What to do |
|---|---|
| Dizziness, fainting | Stand up slowly, especially when starting (MedlinePlus, Tamsulosin) |
| Painful erection lasting hours | Report it at once (MedlinePlus, Tamsulosin) |
| Eye surgery planned | Tell your doctor you take it (MedlinePlus, Tamsulosin) |
Rising slowly helps. Ask the prescriber about anything else you notice.
With supplements03
Can you take tamsulosin with a prostate supplement?
Ask your doctor or pharmacist first. Most herb-drug interactions are hypothetical, but they matter most for narrow-margin drugs.
NCCIH says most identified herb-drug interactions rest on animal, cell or indirect evidence (NCCIH, Herb-Drug Interactions). Protoflow contains hawthorn, which may add to blood pressure drugs (MSK, Hawthorn). Tamsulosin can cause dizziness on standing (MedlinePlus, Tamsulosin). A pharmacist check is sensible.
Do not stop or skip tamsulosin to try a capsule. The doctor who prescribed it sets any change.
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See packsOther medicines04
Does tamsulosin interact with ED pills?
MedlinePlus lists alpha blockers, tamsulosin among them, as medicines to mention if you take tadalafil.
The tadalafil page names alfuzosin, doxazosin and tamsulosin, and says the doctor may change doses or monitor you (MedlinePlus, Tadalafil). Hidden sildenafil or tadalafil has also turned up in "natural" male products (FDA, Alpha-Male public notification). Read Protoflow and medicines, and see finasteride and PSA for the other main BPH medicine.
FAQ05
Protoflow questions people ask
How fast does tamsulosin work for BPH?
Our sources do not give a timeline for tamsulosin. For finasteride, MedlinePlus says at least 6 months (MedlinePlus, Tamsulosin). Ask your prescriber what to expect.
Should tamsulosin be taken at night?
Our sources do not specify. Follow the directions on your prescription label, and ask the pharmacist about timing and dizziness.
Can tamsulosin affect eye surgery?
Yes, MedlinePlus says to tell your doctor you take it before any eye surgery (MedlinePlus, Tamsulosin).
Does tamsulosin lower PSA?
Our sources say finasteride and dutasteride lower PSA (NCI, PSA Test Fact Sheet) and do not say that of tamsulosin. Tell your doctor about all your medicines before a test.
Is tamsulosin the same as saw palmetto?
No. Tamsulosin is a prescription alpha blocker. Saw palmetto is a herb that NCCIH calls probably not helpful for BPH (NCCIH, Saw Palmetto).
Who wrote this06
Written and reviewed by
Pages built from the label, the brand pages and linked NIH, FDA, FTC, NICE and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by a USA authorized Protoflow retailer, not by the manufacturer or distributor, PhytoThrive Labs. We make money when you buy through our order links.
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