Ingredient safety
L-Arginine Side Effects: Blood Pressure and Nitrates
L-arginine side effects include nausea, belly pain, diarrhea, bloating and headache, and the larger concern is blood pressure. Mayo Clinic says it may lower blood pressure and can clash with nitrates, sildenafil and blood pressure medicine. Quietum Plus lists L-arginine with no printed amount, so ask your doctor or pharmacist first.
Written by the Quietum Plus label deskUpdated · 4 min read
What are the side effects of L-arginine?
Common L-arginine side effects are nausea, abdominal pain, diarrhea and bloating. Mayo Clinic also lists headache, gout, allergic reactions and worsened asthma (Mayo Clinic, L-arginine).
It says oral L-arginine is generally considered safe, but it may lower blood pressure. That is the effect to take seriously if you already take a blood pressure drug.
These notes come from a general health reference, not from a Quietum Plus study. The product prints no L-arginine amount, so we cannot say how likely any effect is.
| Type | Examples |
|---|---|
| Digestive | Nausea, abdominal pain, diarrhea, bloating |
| Other | Headache, gout, allergic reactions, worsened asthma |
| Blood pressure | May lower it |
Does L-arginine interact with blood pressure drugs and nitrates?
Yes, L-arginine may interact with nitrates, sildenafil and blood pressure medicine. Together they can drop blood pressure too low (Mayo Clinic, L-arginine).
Mayo also lists higher bleeding risk with blood thinners, lower blood sugar with diabetes drugs, and high potassium with potassium-sparing water pills. It is not recommended after a recent heart attack, since it might raise the risk of death.
Keep taking prescribed medicine. Do not stop a heart or blood pressure drug to try a supplement.
- Nitrates, sildenafil or similar drugs: ask your prescriber first.
- Recent heart attack: do not use it without your cardiologist's say.
- Dizziness or fainting after a new supplement: stop and call a doctor.
Is L-arginine used for tinnitus?
No source we cite connects L-arginine to tinnitus or hearing. The Mayo page covers blood pressure and sexual function, not the ear.
The 2026 guideline advises against recommending supplements for persistent, bothersome tinnitus (AAO-HNSF Tinnitus Update 2026). Sudden hearing loss in one ear needs same-day care. Ringing that beats with your pulse, follows a head injury, or comes with dizziness, weakness or a drooping face needs a doctor, and face weakness is an emergency.
It calls for a hearing exam with an audiologist or ENT.
Quietum Plus: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · 60-day money-back guarantee
See packsHow does Quietum Plus list L-arginine?
L-arginine shares the ninth sales-page tile with L-tyrosine. The page says the pair "May exhibit significant mood-enhancing properties". We found no study in our sources that supports this for the capsule.
Quietum Plus is a capsule supplement, 60 per bottle, with no printed amounts, serving or warnings in the images we reviewed. See the L-tyrosine and L-arginine page and supplements and medicines.
Packs cost $79, $69 or $49 a bottle, with a 60-day money-back guarantee. Follow your bottle's label.
Order Quietum Plus
Thinking of trying it? The bigger packs cost less per bottle.
Prices from the sales page, October 19, 2026 (Quietum Plus order section). Two bottles are $158 plus $9.99 shipping. Every pack carries the 60-day money-back guarantee. Check your medicines first.
01FAQ
L-arginine questions
Can L-arginine lower blood pressure too much?
It may, according to Mayo Clinic, especially with nitrates, sildenafil or blood pressure medicine. Signs include dizziness and fainting. Ask your doctor or pharmacist before use, and do not change prescribed medicine on your own.
Is L-arginine safe after a heart attack?
Mayo Clinic does not recommend it after a recent heart attack, because it might increase the risk of death. If you have heart disease, talk to your cardiologist before any supplement that lists L-arginine.
Does L-arginine cause gout or asthma problems?
Mayo lists gout and worsened asthma among possible effects. We cannot give a rate. If you have gout or asthma, tell your doctor before using a product that contains L-arginine, and bring the bottle.
02Who wrote this
Written and reviewed by
Pages built from the bottle images, the sales page and linked NIH, NIDCD, FDA, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by Goquietumplus, a USA Authorized Quietum Plus Retailer, not by the manufacturer. We earn money when you buy through our order links.
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