Amlexanox

Amlexanox is a small anti-allergic and anti-inflammatory molecule developed by Takeda in Japan in the 1980s.

Human trialsNon-peptide compound reference

Also known as: Aphthasol, Solfa, AA-673, CHX-3673, Amoxanox, Elics, UNII BRL1C2459K

(how we review)

Dosing & scaling, explained

Amounts reported for Amlexanox are listed under Reported protocols, each with its source and study kind. No amount ladder is inferred from them. This is educational source context, not a protocol or recommendation.

No source-supported amount ladder is shown

Enter a target amount only from your own reviewed source. The calculator can convert it into concentration, volume and device markings, but it will not infer an amount from product availability or another compound.

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No independently verified schedule

Clinical context

Human study rows are described per source under Reported protocols; they belong to their trial populations and are not a general amount.

Storage, handling and interpretation

Product identity

Verify the exact compound, formulation and amount against the product label or certificate before calculation.

Storage & handling

Follow the product label, certificate and validated laboratory SOP; no universal storage assumption is applied here.

Prepared solutions

Label concentration and preparation date, use sterile technique where applicable, and follow a validated stability protocol.

Reported protocols for Amlexanox

What published studies and recent community write-ups report about amounts, timing and course length. 3 clinical, 1 preclinical and 2 community-reported rows, each linked to its source. These are descriptions of what others report, not instructions, and nothing here is medical advice.

ContextDoseFrequencyRouteCourseSource
Clinical3 rows
Proof-of-concept trial in type 2 diabetes with fatty liver42 obese adults with type 2 diabetes and nonalcoholic fatty liver disease, randomised double-blind to amlexanox or placebo (NCT01975935); 38 completed 12 weeks50 mg (two 25 mg capsules)Three times daily, without titrationOral12 weeks, with a 4-week follow-up off drugNot applicableCell Metabolism (PubMed Central)2017
HbA1c and fructosamine fell significantly against placebo, and a subset of treated patients, the responders, also improved insulin sensitivity and hepatic steatosis; responders had a distinct inflammatory gene expression signature in subcutaneous fat biopsies at baseline and a gene expression response consistent with higher energy expenditure. In a preceding open-label study of six patients who took 25 mg three times daily for 2 weeks then 50 mg for 10 weeks, two developed a generalised itchy rash at about four weeks that settled within two weeks despite continued dosing. The 50 mg dose was chosen because it had been used for asthma in Japan.
Trial registration for the diabetes studyPlanned 40 adults with type 2 diabetes (HbA1c 6.5-10%) and BMI 27-45 on metformin, DPP-4 inhibitors or no medication25 mg to start, titrated to 50 mgThree times daily (25 mg for 2 weeks, then 50 mg)Oral tablets3 monthsSafety and efficacy repeated 4 weeks after stoppingClinicalTrials.gov2013
The registration states that the doses were those used to treat asthma in humans and that they produce serum concentrations comparable to the metabolically effective doses in rodents; HbA1c was the primary endpoint and weight a secondary one, with safety bloods at weeks 1, 2, 4, 6 and 12. The registered amlexanox came from Japan, since no oral product has ever been approved in the United States.
Approved US label (Aphthasol 5% oral paste)Adults with aphthous ulcers and normal immune systemsA dab of 5% paste about 1/4 inch (0.5 cm) long on each ulcerFour times daily, after oral hygiene following breakfast, lunch, dinner and at bedtimeTopical to the mouth ulcerUntil the ulcer heals; seek advice if no improvement in 10 daysNot applicableUS Food and Drug Administration2002
This is the only amlexanox product the FDA has ever approved: a topical paste supplied in 5 g tubes, applied as soon as an ulcer is noticed and continued until it heals, with patients told to wash their hands after each application and to stop if a rash or contact mucositis appears. The paste was later discontinued in the United States for commercial reasons. A 2020 review records that oral tablets remained in legal use in Japan for asthma, which is the only precedent for the swallowed doses used in the diabetes trial.
Preclinical1 row
Obese mice (prevention and reversal of diet-induced obesity)C57BL/6 mice on a 45% fat diet and genetically obese ob/ob mice25 or 100 mg/kg per dayDaily by gavageOral4-8 weeks, started either with the high-fat diet or after 12 weeks of itWeight loss reversed when dosing stoppedNature Medicine (PubMed Central)2013
Amlexanox raised oxygen consumption and energy expenditure, produced reversible weight loss, improved insulin sensitivity in clamp studies (at 50 mg/kg) and cleared hepatic steatosis, and 100 mg/kg also reduced weight in ob/ob mice. The authors identified the drug by screening for inhibitors of TBK1 and IKK-epsilon, kinases induced in fat and liver by high-fat feeding; mouse doses per kilogram are far higher than the 150 mg a day later given to people.
Community-reported2 rows
Bodybuilding-oriented dosing table (community)25-100 mg three times a day as the page's summary of human studies; 'no standardized bodybuilding dosing exists'Twice daily suggested by the page on the basis of a 4-6 hour half-lifeOral capsules; sublingual troches described as rare8-12 weeks in the page's tableNot describedCommunity resource2026
This 2026 physique-oriented article promotes amlexanox for fat loss and lists forum reports of gradual leaning over three to five weeks, warmer body temperature and a group of non-responders. Its table does not match the published record: the only completed trial used 50 mg three times daily for 12 weeks, there is no separate 100 mg three-times-daily fatty liver study, and no trial has tested amlexanox for weight loss in people without diabetes. The stacks it describes with GLP-1 agonists, thyroid hormone or stimulants have no study behind them.
Vendor capsule format25 mg per capsule, 60 capsules per bottle; no dose statedNot statedOralNot statedNot statedCommunity resource2026
A vendor claim. The certificate for lot AM01 measured 28.07 mg per capsule against the 25 mg label; two capsules equal the 50 mg trial dose, so the bottle holds ten days of the trial regimen of 150 mg a day. An independent compound guide reviewed on 1 October 2026 describes such capsules as an approved topical drug repackaged for a systemic use tested once, in 42 people, for twelve weeks.
Sources for this section (8)
  1. Inhibition of IKK-epsilon and TBK1 Improves Glucose Control in a Subset of Patients with Type 2 DiabetesCell Metabolism (PubMed Central)2017Clinical
  2. Efficacy of Amlexanox vs. Placebo in Type 2 Diabetic Patients (NCT01975935)ClinicalTrials.gov2013Clinical
  3. Aphthasol (amlexanox) Oral Paste, 5% package insert (NDA 20-511)US Food and Drug Administration2002Clinical
  4. Amlexanox: A Novel Therapeutic for Atopic, Metabolic, and Inflammatory DiseaseYale Journal of Biology and Medicine (PubMed)2020Clinical
  5. An inhibitor of the protein kinases TBK1 and IKK-epsilon improves obesity-related metabolic dysfunctions in miceNature Medicine (PubMed Central)2013Preclinical

Plus 3 community resources (dosing guides, forum threads and vendor write-ups), reported above but not linked.

Overview

Amlexanox is a small anti-allergic and anti-inflammatory molecule developed by Takeda in Japan in the 1980s, where it was sold as Solfa tablets for asthma and allergic rhinitis, and approved in the United States in 1996 as Aphthasol, a 5% oral paste for canker sores that was later withdrawn for commercial rather than safety reasons. In 2013 Alan Saltiel's group found that it inhibits the kinases TBK1 and IKK-epsilon, which raised energy expenditure and reversed obesity and fatty liver in mice, and a 12-week proof-of-concept trial in 42 obese adults with type 2 diabetes and fatty liver (50 mg three times a day) lowered HbA1c, with insulin sensitivity and liver fat improving only in a responder subgroup that could be identified by an inflammatory signature in their fat. It has no approval for any metabolic use anywhere, a phase 3 programme never followed, and it is sold online as 25 mg capsules.

What researchers are exploring

These themes describe recurring questions in published research. They are not claims of effectiveness or recommendations for use.

  • 1

    Metabolic research

    Energy balance, body composition and incretin signaling.

  • 2

    Immune & inflammation

    Innate defense, inflammatory signaling and barrier models.

  • 3

    Proof-of-concept trial in type 2 diabetes with fatty liver

    HbA1c and fructosamine fell significantly against placebo, and a subset of treated patients, the responders, also improved insulin sensitivity and hepatic steatosis; responders had a distinct inflammatory gene.

  • 4

    Trial registration for the diabetes study

    The registration states that the doses were those used to treat asthma in humans and that they produce serum concentrations comparable to the metabolically effective doses in rodents; HbA1c was the primary endpoint and.

  • 5

    Approved US label (Aphthasol 5% oral paste)

    This is the only amlexanox product the FDA has ever approved: a topical paste supplied in 5 g tubes, applied as soon as an ulcer is noticed and continued until it heals, with patients told to wash their hands after.

  • 6

    Obese mice (prevention and reversal of diet-induced obesity)

    Amlexanox raised oxygen consumption and energy expenditure, produced reversible weight loss, improved insulin sensitivity in clamp studies (at 50 mg/kg) and cleared hepatic steatosis, and 100 mg/kg also reduced weight.

What the current evidence can support

Study models remain visible so laboratory and animal findings are not mistaken for established human outcomes.

  • Human

    Human studies and registrations

    3 protocol rows on this page come from human trials, trial registrations, regulator labels or reviews of human data. Approval status and populations are stated per row.

  • Animal

    Preclinical models

    1 protocol row describe animal, cell or toxicology work. Amounts from these rows do not translate to people.

  • Not graded

    Community-reported use

    2 rows record what blogs, vendor write-ups or forums describe for Amlexanox. None has been verified against primary literature.

Chemistry identifiers

Sequence, synonyms and registry identifiers as recorded in PubChem, the National Library of Medicine's open chemistry database. Formula, mass and CAS number are summarized at the top of the page.

Also listed as

Aphthasol, Solfa, AA-673, CHX-3673, Amoxanox, Elics, UNII BRL1C2459K

InChIKey

SGRYPYWGNKJSDL-UHFFFAOYSA-N

IUPAC name

2-amino-5-oxo-7-propan-2-ylchromeno[2,3-b]pyridine-3-carboxylic acid

Limitations and unknowns

Important limitations

  • Every amount on this page is a report of what a source describes, not a protocol to follow.
  • Preclinical and community rows do not establish a human amount, schedule or route.
  • Formulation, purity and presentation vary by supplier and are not covered by the dossier.

Sources

6 curated references, each with its journal, year and study model, plus 3 community resources reported but not linked.

  1. Amlexanox (PubChem CID 2161)PubChem, National Library of Medicine2026Not graded
  2. Inhibition of IKK-epsilon and TBK1 Improves Glucose Control in a Subset of Patients with Type 2 DiabetesCell Metabolism (PubMed Central)2017Human
  3. Efficacy of Amlexanox vs. Placebo in Type 2 Diabetic Patients (NCT01975935)ClinicalTrials.gov2013Human
  4. Aphthasol (amlexanox) Oral Paste, 5% package insert (NDA 20-511)US Food and Drug Administration2002Human
  5. Amlexanox: A Novel Therapeutic for Atopic, Metabolic, and Inflammatory DiseaseYale Journal of Biology and Medicine (PubMed)2020Human
  6. An inhibitor of the protein kinases TBK1 and IKK-epsilon improves obesity-related metabolic dysfunctions in miceNature Medicine (PubMed Central)2013Animal