L-Arginine: uses, dosing, side effects & brands
L-Arginine is a medicine sold in the U.S. under one brand. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Sold as
- L-Arginine
- Generic available?
- Yes
Every l-arginine product we track (1)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
Only one: L-Arginine.
L-Arginine recalls
From the FDA Enforcement database. A recall covers specific lots — not the drug as a whole.
What people report to the FDA about l-arginine
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 671 reports naming l-arginine, and the FDA flagged 59% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- fatigue61 reports
- headache44 reports
- nausea38 reports
- diarrhoea34 reports
- asthenia32 reports
- vomiting30 reports
- dizziness28 reports
- dyspnoea27 reports
Read these as a signal, not a rate. A report does not mean l-arginine caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved July 25, 2026.
Related calculators
Frequently asked questions
Can you take l-arginine with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run l-arginine against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
Is there a generic l-arginine?
Yes. Our catalog lists 1 generic l-arginine product alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.
Has l-arginine been recalled?
The FDA's Enforcement database lists 2 recall records whose product description mentions l-arginine. The most recent: L-Arginine HCl for Injection (Jul 30, 2025). A recall applies to specific lots, not to the drug as a whole — check the record for the affected lot numbers.
Cite this page
- APA
- pharmaranks. (2026, July 24). L-Arginine: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/l-arginine
- MLA
- “L-Arginine: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/l-arginine.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for l-arginine on DailyMed (NIH) ↗.