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Compound

Agmatine Sulfate

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Agmatine Sulfate. Arginine metabolite with NMDA modulation and analgesic properties.

How it works. Blocks NMDA receptor, inhibits nitric oxide synthase, modulates imidazoline receptors.

What the research supports. 1 graded claims. Strongest: Adjunct for neuropathic pain (limited).

How much to take. Typical dose: 1.25–2.6 g.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Omega-3 (EPA/DHA), Alpha-GPC or CDP-choline.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Agmatine Sulfate. Anecdotes are not medical advice.

Agmatine Sulfate. Arginine metabolite with NMDA modulation and analgesic properties.

Molecular structureC5H16N4O4S · 228.27 g/mol

What it is

Arginine metabolite with NMDA modulation and analgesic properties.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

Goals

Brain & CognitiveMood & Anxiety

How it works

Blocks NMDA receptor, inhibits nitric oxide synthase, modulates imidazoline receptors.

Pathways

  • Blocks NMDA receptor, inhibits nitric oxide synthase, modulates imidazoline receptors

Effects

  • +Adjunct for neuropathic pain supports

What the research supports

Adjunct for neuropathic painlimited

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
1.25–2.6 g
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEmpty stomach
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • GI upset

Medication interactions

Prescription medications (general)minor

Always disclose Agmatine Sulfate use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Omega-3 (EPA/DHA)Membrane fluidity and neuronal signaling support.
  • Alpha-GPC or CDP-cholineProvides choline substrate for acetylcholine synthesis.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: Agmatine Sulfate — Adjunct for neuropathic pain ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Agmatine Sulfate and "Adjunct for neuropathic pain". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Agmatine Sulfate — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Agmatine Sulfate and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Agmatine Sulfate — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Agmatine Sulfate and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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