Learn
Prostate Supplements and Prostate Medicines: Interactions and What to Ask
A supplement is not a replacement for a prostate medicine. Keep taking tamsulosin, finasteride or any prescription as directed, and tell your pharmacist about Prostadine. Known notes include iodine with thyroid, ACE-inhibitor and diuretic medicines, saw palmetto with blood thinners, and finasteride lowering PSA.
Written by the Prostadine label deskUpdated
The first rule01
Keep taking what you are prescribed
A supplement belongs beside your medicines, never in front of them. If a doctor prescribed something for your prostate, bladder, thyroid, heart or blood pressure, the right default is to keep taking it exactly as directed until the prescriber says otherwise.
The NCCIH and the NIH both make the same point about all supplements: they can interact with prescription and over-the-counter medicines and can be risky with some conditions, so tell every health care provider about everything you use (NCCIH, Using Supplements Wisely) (NIH ODS, Supplements: What to Know). FDA says the same and adds that it does not approve supplements for safety and effectiveness before they are marketed (FDA, Using Dietary Supplements).
That matters especially in a field where proven medicines exist. A man whose symptoms are controlled by an alpha blocker has nothing to gain by dropping it for a bottle with no trial behind it, and a lot to lose.
The medicines02
The two main prostate medicine families
| Medicine | What it does | Points to know |
|---|---|---|
| Tamsulosin (alpha blocker) | Relaxes muscle in the prostate and bladder; taken once daily 30 minutes after a meal | May cause dizziness and fainting on standing; tell your eye surgeon before cataract surgery that you take or took it (MedlinePlus, Tamsulosin) |
| Finasteride (5-alpha reductase inhibitor) | Prescribed for BPH; may control it but will not cure it | Symptoms may take at least 6 months to improve; common effects include erection problems, lower desire and ejaculation changes; tell the lab before any test (MedlinePlus, Finasteride) |
| Dutasteride (same family) | A related medicine | Lowers PSA like finasteride (NCI, PSA test) |
None of these sources lists Prostadine or any of its ingredients as a replacement, and none has been tested together with it. The honest statement is that interactions are unstudied for this formula, and that the ingredient-level notes below are reasons to ask, not proof of harm.
Ingredient notes03
Which ingredient matters for which medicine
Read across the table. Each row is a medicine type, and each note comes from the sources linked.
| If you take | Ingredient to think about | Note |
|---|---|---|
| Blood thinner (warfarin, rivaroxaban), antiplatelet or NSAID | Saw palmetto; pomegranate | Saw palmetto may increase bruising and bleeding (MSK, Saw Palmetto); a case report with warfarin for pomegranate (MSK, Pomegranate) |
| Thyroid medicine, especially an antithyroid drug | Nori, wakame, kelp, bladderwrack, iodine | Added iodine can cause hypothyroidism with antithyroid drugs (NIH ODS, Iodine) |
| ACE inhibitor or potassium-sparing diuretic | Iodine (potassium iodide) | Raised potassium risk (NIH ODS, Iodine) |
| Statin | Pomegranate (juice) | May raise muscle-injury risk (MSK, Pomegranate) |
| Many regular prescriptions | Neem | Lab inhibition of liver enzymes that process medicines; relevance unknown (MSK, Neem) |
| Finasteride or dutasteride | None identified | These lower PSA; tell the lab (MedlinePlus, Finasteride) (NCI, PSA test) |
At the pharmacy04
How to ask a pharmacist, in three sentences
A pharmacist can check combinations in minutes and is often easier to reach than a doctor. A short script helps.
I am thinking of taking a supplement with nine ingredients, including four seaweeds, iodine, saw palmetto, pomegranate and neem. I take the medicines on this list. Do you see anything I should check with my doctor before I start?
Bring the bottle or a photo of the front
Show the name and the ingredient list from the info page. If you have a panel, show that too.
List every medicine, including over-the-counter ones
Cold remedies, antacids and pain relievers matter as much as prescriptions.
Write down the answer
Note the pharmacist's name and the date, and what they said about each ingredient.
If the pharmacist suggests ringing your prescriber, do so. Not every interaction is dangerous, but you want a clinician who knows your history to be the one to decide.
Prostadine: from $49 a bottle60 mL · 2 mL a day · free US shipping on 3 or 6 · 60-day money-back guarantee
See packsWhy it is hard to know05
Why interaction answers are often “we do not know”
Medicine labels come from large trials in which regulators require interactions to be tested. Supplements do not face that test before they are sold (FDA, Using Dietary Supplements). So for most combinations the honest answer is that nobody has looked.
What exists instead is a patchwork. Case reports describe a single patient who had a problem. Laboratory work shows an effect in cells or enzymes that may or may not matter in a person. Reviews pull those pieces together, as the Memorial Sloan Kettering entries do for saw palmetto, pomegranate and neem. All of that is useful for raising a flag, and none of it can say how likely a problem is for you.
The practical response is caution proportionate to the stakes. A blood thinner, a thyroid medicine or a heart medicine has a narrow margin for error, so those combinations deserve a conversation first. A multivitamin with a mild laxative effect is a smaller matter. Let the stakes of your own medicines set how careful you are.
Do not06
Four things not to do
- Do not stop or reduce a prescription to “make room” for a supplement.
- Do not take extra of any product to speed up an effect, especially one with iodine (NIH ODS, Iodine).
- Do not mix several supplements with the same ingredient without adding up the amounts.
- Do not hide a supplement from a surgeon or an anaesthetist before an operation. Saw palmetto bleeding reports include cases during surgery (MSK, Saw Palmetto).
If you notice a new symptom after adding a supplement, such as dizziness, bleeding, a racing heartbeat or severe stomach upset, stop it and call a clinician. The side effects page lists what to watch for, and the iodine page covers the thyroid in detail.
- Saw Palmetto. Memorial Sloan Kettering Cancer Center, Integrative Medicine, 2023.Reports conflicting data on BPH symptoms (some trials improved, others showed no effect). Did not affect serum PSA more than placebo, even at high doses. Common side effects are stomach upset, diarrhea, fatigue, headache, decreased libido and rhinitis. Case reports include bleeding problems (including with rivaroxaban and during surgery), liver damage and pancreatitis. May increase bruising and bleeding risk with anticoagulants, antiplatelets and NSAIDs.
- Iodine: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements, 2024.RDA for adults is 150 mcg a day; the tolerable upper intake level is 1,100 mcg a day. Dried nori, 2 tablespoons of flakes (5 g): 116 mcg. Seaweeds range from 16 to 2,984 mcg per gram. High intakes can cause goiter, elevated TSH and hypothyroidism, and iodine-induced hyperthyroidism and thyroiditis. Interactions: antithyroid drugs (additive effect, hypothyroidism), and potassium iodide with ACE inhibitors or potassium-sparing diuretics (hyperkalemia risk).
- Tamsulosin. MedlinePlus (National Library of Medicine), 2025.An alpha blocker for BPH that relaxes muscles in the prostate and bladder; taken once daily 30 minutes after a meal; controls symptoms but does not cure. May cause dizziness and fainting, especially on standing. Tell your doctor before eye (cataract) surgery that you take or took tamsulosin.
- Finasteride. MedlinePlus (National Library of Medicine), 2025.Prescribed for BPH; may control it but will not remove the cause, and symptoms may take at least 6 months to improve. Common side effects include erection problems, decreased sexual desire and ejaculation problems. Before any lab test, tell your doctor and the lab that you take finasteride.
- Using Dietary Supplements Wisely. National Center for Complementary and Integrative Health (NIH), 2019.The FDA is not authorized to review dietary supplements for safety and effectiveness before they are sold. Supplements can interact with prescription and over-the-counter medicines and can be risky with some conditions. Tell all your health care providers about every supplement you use.
FAQ07
Prostadine questions people ask
Can I take Prostadine with tamsulosin?
We found no study of that combination. Keep taking tamsulosin as prescribed, tell your doctor and pharmacist about the drops and watch for dizziness, which tamsulosin can cause on standing (MedlinePlus, Tamsulosin).
Can I take Prostadine with finasteride?
Ask your prescriber. Finasteride lowers PSA, so your doctor needs to know about every product you use when reading a result (MedlinePlus, Finasteride) (NCI, PSA test).
Does Prostadine interact with blood thinners?
It might. Saw palmetto may increase bleeding and bruising with anticoagulants, antiplatelets and NSAIDs (MSK, Saw Palmetto), and pomegranate has a warfarin case report (MSK, Pomegranate). Ask a pharmacist before starting.
Should I tell my doctor I take Prostadine?
Yes. Four seaweeds and iodine itself affect the thyroid, and several lines interact with medicines. Tell every clinician and pharmacist you see, and keep an up-to-date list.
Who wrote this08
Written and reviewed by
Pages built from the bottle photos, the info page and linked NIH, FDA, NCI, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a licensed U.S. retail desk for Prostadine, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about Prostadine
Licensed U.S. retail desk — Prostadine
Ready to try Prostadine?
Check your medicines first, then pick a pack. Three or six bottles ship free in the US and cost less per bottle, and every pack carries the 60-day money-back guarantee.
- Secure checkout
- 60-day money-back guarantee
- Ships from the U.S., free on 3 or 6
