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ProstaFlow, Dutasteride and Other Medicines: 5 Steps Before You Mix
Quick answer. ProstaFlow is a dietary supplement, not a medicine, and the label names no interaction with dutasteride. The one interaction worth naming involves nitrate medicines and PDE5 inhibitors, because arginine and citrulline feed the same pathway. Five steps below help you raise it with your prescriber before the first capsule.
- No interaction with dutasteride is named on the label or in our sources. That is a gap, not a clearance.
- The one clash worth naming: arginine and citrulline feed nitric oxide, the route that nitrate medicines and PDE5 inhibitors use.
- The label says people with a known medical condition should consult a physician before using this or any dietary supplement.
- Add up arginine and citrulline across every product you take. A single capsule here delivers roughly 333 mg of arginine, plus 200 mg of citrulline in salt form.
- No study of ProstaFlow beside any medicine is published.
- Nothing here offers a change in a PSA reading.
Is ProstaFlow a medicine, and does it replace one?
No to both. ProstaFlow is a dietary supplement, not a drug, and the FDA has not approved it. It is not meant to diagnose, treat, cure or prevent any disease, so it cannot stand in for anything your prescriber has written for you.
Men sometimes ask whether a capsule like this can be used instead of a prescription for urinary symptoms. Our answer is no. Two families of prescription medicine are used for those symptoms, and neither route is on this panel. If you are on one of them, ProstaFlow is an extra, never a swap. Part two of the 2026 guideline, on medical management, sets out where each family belongs.
What are the 5 steps before you mix ProstaFlow with a medicine?
Step 1. List everything you take
Write down every prescription, every over-the-counter product and every supplement, with doses. Include pre-workout powders. A single list makes the next steps quick.
Step 2. Look for a nitrate or a PDE5 inhibitor
These are the two groups where a specific conversation is needed. A nitrate for angina works by donating nitric oxide. A PDE5 inhibitor works by keeping the nitric oxide signal going. Arginine and citrulline supply raw material for the same signal.
Step 3. Ask about every other medicine by name
That includes dutasteride and any other prostate medicine. We found no published interaction, and no study either way, so the honest word is not published. Your prescriber knows your history and we do not.
Step 4. Add up the amino acids across products
A pre-workout powder can carry grams of arginine or citrulline. Two products bought separately can add up to far more than either label suggests. Total it before you decide.
Step 5. Tell your prescriber, then write down the answer
One sentence is enough: this capsule contains arginine, arginine AKG and two forms of citrulline, all nitric oxide precursors. Note the reply and the date.
Spoken to your prescriber already?
If the answer was yes, the official checkout lists today’s price for each pack, and the written guarantee covers a change of mind.
See today’s price and guaranteeThis website sells ProstaFlow and earns money when you order. How that works. The checkout shows the current price.
What do the sources say about each kind of medicine?
| Medicine type | What our sources say | What to do |
|---|---|---|
| Nitrate for angina | Named interaction: same nitric oxide pathway | Tell the prescriber before the first capsule. |
| PDE5 inhibitor | Named interaction: same pathway from the other end | Tell the prescriber, whether you take it daily or on demand. |
| Blood pressure medicine | Amounts here are far below doses that moved blood pressure in trials | Mention it at your next appointment. |
| Medicine for urinary symptoms | Neither family works through anything on this panel | Mention the supplement at your next review. |
| Dutasteride | Not published. No interaction is named. | Ask the prescriber. Do not assume. |
| An ordinary multivitamin | No conflict named on this panel | Watch total niacin if you add a high-dose B3 product. |
Read from the label caution and the seller’s own safety page. The label tells anyone under a clinician’s care to ask a physician first.
Notice the third row. Small amounts are not a reason to say nothing. A one-minute chat at your appointment costs nothing, and it keeps your record accurate.
Why do nitrates and PDE5 inhibitors get special mention?
Nitric oxide is a signal that relaxes the muscle in blood vessel walls. That widens the vessel and lowers the pressure inside it. Arginine and citrulline sit on this panel because the body can use them to make it.
One trial in our sources paired a PDE5 inhibitor with a nitric oxide donor in men who had stable angina, and blood pressure dropped a lot. A review of nitrate side effects covers what else happens on that route when it is pushed hard.
Two honest qualifications belong beside that. The amounts in one ProstaFlow capsule are far below those that moved blood pressure in the arginine dose-response work, so an effect at one capsule a day is unlikely. Even so, a small amount on a real pathway still deserves one clear sentence to the prescriber.
What about a PSA test or other prostate checks?
ProstaFlow makes no claim about PSA. No page here promises a different PSA number, and no study of the capsule and PSA is published. If you are due for a PSA test, tell the clinician which supplements you take, and let them decide what it means.
Whether to have a PSA test at all is a separate decision. Our sources name the Task Force’s statement on PSA screening, and it is worth reading with your doctor on its own terms.
Not published: any study of ProstaFlow beside dutasteride or another prostate medicine, and any study of the capsule and a PSA reading.
Can you take it every day while on medicine?
One capsule a day is the label dose, and it tells you not to go above it. Taking it daily is the intended pattern. Whether a daily supplement suits you alongside your medicines is a question for your prescriber, not for a website.
If anything unusual happens, stop. Write down what happened, what time you took the capsule and what else you took that day. Seek care if it involves breathing, swelling, chest pain or fainting, and call the order desk about the order side.
Frequently asked questions
Can I take ProstaFlow with dutasteride?
No interaction is named on the label or in our sources, and no study is published. That is a gap, not a clearance. Ask the doctor who prescribed it.
Is ProstaFlow safe with a nitrate medicine?
Check with your prescriber first. Nitrate medicines work through the same nitric oxide route that arginine and citrulline feed.
Can I take ProstaFlow with a PDE5 inhibitor?
The same caution applies. In a trial of men with stable angina, a PDE5 inhibitor plus a nitric oxide donor produced a large blood pressure drop. Tell your prescriber.
Does ProstaFlow lower or change my PSA?
No such claim is made, and no study of the capsule and PSA is published. Tell the clinician who orders your test that you take it.
Is ProstaFlow a medicine?
No. It is a dietary supplement, not a drug and not FDA approved. It cannot replace a prescription.
Can I take it every day with other supplements?
The label sets one capsule a day. Add up arginine and citrulline across every product you take, because pre-workout powders can carry grams of both.
Our view
The medicine question has one clear answer and one open gap. The clear answer is about nitrates and PDE5 inhibitors: speak to your prescriber first. The gap is everything else, dutasteride included, where nothing is published.
We will not fill a gap with a guess. If a medicine matters to your health, a supplement with no studies beside it deserves a short chat with the person who knows your records.
ProstaFlow is a dietary supplement, not a drug, and it is not FDA approved. Take your list of medicines to your doctor, and let them make the call.
Medicine list sorted?
When you are ready, the checkout shows the current price and the 60-day guarantee together.
See today’s price and guaranteeThis website sells ProstaFlow and earns money when you order. How that works. The checkout shows the current price.
Sources named on this website
- The trial that measured the nitrate interaction: https://pubmed.ncbi.nlm.nih.gov/10898408/
- A review of the side effects of nitrates: https://pubmed.ncbi.nlm.nih.gov/16907656/
- The US Preventive Services Task Force statement on PSA screening: https://pubmed.ncbi.nlm.nih.gov/29801017/
- Part two of the 2026 guideline, on medical management: https://pubmed.ncbi.nlm.nih.gov/42095477/
Last updated . Reviewed October 16, 2026 by Dr. Anurag Chahal, MD.
