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DMHA

Status: Historical pharmaceutical, , not approved for human use
Evidence: Not graded on a research bench yet

DMHA (octodrine) - chemically 2-amino-6-methylheptane, also sold as 2-aminoisoheptane or 1,5-dimethylhexylamine - is an aliphatic-amine central nervous system stimulant and a close structural analog of DMAA (1,3-dimethylamylamine).

Reviewed 25 October 2026

01Overview

What DMHA is

Originally introduced in the 1950s as a nasal decongestant and vasopressor, it re-emerged around 2015 as a gray-market pre-workout and 'fat-burner' ingredient. It is not an approved dietary ingredient in the US and has essentially no modern clinical safety data. Presented here for research and educational use only.

How it works

DMHA (octodrine; 2-amino-6-methylheptane / 1,5-dimethylhexylamine) is a simple aliphatic amine that behaves as an indirect sympathomimetic - structurally and pharmacologically a close cousin of DMAA (1,3-dimethylamylamine). Agents in this class raise synaptic activity of the catecholamines norepinephrine and dopamine (by promoting their release and/or slowing reuptake), which drives central nervous system stimulation, heightened alertness and focus, appetite suppression, and peripheral vasoconstriction that pushes up blood pressure and heart rate. A 2018 Brain Sciences review describes octodrine as a central stimulant that increases dopaminergic and noradrenergic signaling and notes it was originally developed as a 1950s nasal decongestant and vasopressor [PMID:29461475]. Historical animal work on the octodrine camphorsulfonate salt characterized it as a circulatory/vasoactive agent affecting blood pressure, pulse, and coronary flow [PMID:5632522][PMID:5136846]. After ingestion, octodrine is rapidly metabolized to heptaminol, which becomes the predominant species detected in blood and urine [PMID:39401652]. Its precise receptor pharmacology in humans at the doses used in supplements has never been formally characterized - mechanistic statements here are extrapolated from its chemical class and limited mid-20th-century data, not from modern human studies.

Benefits listed

Increased energy and perceived training intensity - the reason it is added to pre-workout products (reported by users; not established in any controlled trial)
Sharper focus and heightened alertness from central nervous system stimulation
Appetite suppression, which is why it appears in 'fat-burner' formulas
Mild mood lift or euphoria reported anecdotally

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Users often describe a longer, 'smoother' stimulant feel than caffeine alone - again anecdotal, not clinically demonstrated

What to expect

- Onset roughly 20-45 minutes after an oral dose, felt as a stimulant 'ramp' rather than a sharp hit
- Increased energy, drive, and focus; many users describe it as a stronger, longer-lasting stimulant feel than caffeine
- Noticeable appetite suppression during the active window
- Raised heart rate and blood pressure, sometimes with sweating, warmth, or feeling 'wired'
- A comedown or crash as effects fade (commonly around 3-6 hours), occasionally with fatigue or low mood
- Wide variability between products, because actual DMHA content is inconsistent and often undisclosed

Individual responses vary. Timeline based on commonly reported research observations.

02Research

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What the research shows

No research bench grades DMHA yet. Benches compare compounds people pair, with the evidence for each.

Key research findings

There are no modern controlled clinical trials of DMHA/octodrine for energy, athletic performance, or fat loss - a point emphasized by every current review of the compound. The human-relevant evidence base consists of three strands. First, mid-20th-century animal pharmacology of the octodrine camphorsulfonate salt documented vasoactive and hemodynamic effects on blood pressure, pulse, and coronary flow, from its era as a decongestant and vasopressor [PMID:5632522][PMID:5136846]. Second, a 2018 Brain Sciences review found only five relevant publications across roughly seven decades and flagged reported harms including hypertension, dyspnoea, and hyperthermia [PMID:29461475]. Third, a modern body of analytical-chemistry and toxicology work shows octodrine is widely and inconsistently added to sports and weight-loss supplements - about 72 mg per serving in one analysis [PMID:29115866], 18-73 mg across products in another [PMID:33755516], and up to 112 mg (roughly three times the highest historical pharmaceutical dose) in a third, which also disproved the 'natural plant' origin claim [PMID:29454882]. A 2024 case report established that ingested octodrine is rapidly converted to heptaminol and can trigger anti-doping violations even from a contaminated product [PMID:39401652]. Bottom line: a real compound with real (if dated) pharmacology, but essentially no modern human efficacy or safety data.

Safety and side effects

Reported and expected effects reflect its sympathomimetic activity: elevated blood pressure and heart rate, palpitations or tachycardia, chest tightness, shortness of breath (dyspnoea), overheating (hyperthermia), anxiety and jitteriness, headache, insomnia, and a post-dose crash [PMID:29461475]. Because DMHA is chemically and pharmacologically similar to DMAA - a stimulant investigated in connection with hemorrhagic stroke and sudden death - serious cardiovascular events are a plausible risk, especially at the high doses found in supplements or when stacked with other stimulants [PMID:29115866][PMID:33755516]. Long-term safety in humans is entirely unstudied.

On PubMed

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03Safety

DMHA side effects and interactions

Side effects

Not in our record

Our record lists no side effects for DMHA. That means none are recorded here, not that there are none. The Research section has the written safety notes.

Who should not use it

Contraindications

Avoid entirely if you have any cardiovascular condition (hypertension, arrhythmia, coronary disease), a history of stroke, are pregnant or breastfeeding, are under 18, or take MAO inhibitors, other stimulants, or blood-pressure-affecting medications. Do not combine with other sympathomimetics (high-dose caffeine, DMAA, ephedrine, synephrine, yohimbine) or use before high-heat or endurance exertion where hyperthermia risk is elevated. Competitive athletes must avoid it: octodrine and its metabolite heptaminol are prohibited in competition by WADA and have produced doping sanctions even when they entered the body through a contaminated supplement [PMID:39401652].

Interactions

4 pairings in our record: 4 not rated.

Not rated

Other stimulants (high-dose caffeine, DMAA, ephedrine, synephrine, yohimbine): additive increases in blood pressure and heart rate; a common and risky combination in stacked pre-workouts
Not rated

MAO inhibitors: risk of dangerous hypertensive reactions with any sympathomimetic amine
Not rated

Antihypertensive and cardiac medications: DMHA's pressor effect can oppose blood-pressure medicine and add cardiac strain
Not rated

Multi-stimulant 'cocktail' products: lab testing found DMHA combined with as many as four experimental stimulants in a single product, compounding unknown risks [PMID:33755516]

This interaction data is compiled from published research and community reports. It may not be exhaustive. Always consult a healthcare professional before combining compounds.

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04Dosing

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DMHA dosage and protocols

Dose range: 75-200 mg per dose (anecdotal pre-workout range; ~75,000-200,000 mcg). Historical pharmaceutical unit dose was 8-33 mg. No approved or clinically validated dose exists.
Dosing: Acute, single-session (pre-workout) use rather than a daily or continuous compound. Users typically leave rest days between doses to limit tolerance buildup and cardiovascular strain; there is no evidence base for any regular dosing schedule.

Dosing summary

Dose: 75-200 mg per dose (anecdotal pre-workout range; ~75,000-200,000 mcg). Historical pharmaceutical unit dose was 8-33 mg. No approved or clinically validated dose exists.
Route: Oral (capsule or pre-workout powder)
Frequency: Acute, single-session use; not daily or continuous
Duration: No established or evidence-based cycle. As a sympathomimetic stimulant, prolonged daily use is discouraged; anecdotal practice is intermittent, training-day-only use with frequent breaks. No safety data support any long-term cycle.

Protocols

Beginner protocol

There is no established, approved, or clinically validated dose for DMHA. The figures below reflect what pre-workout users report anecdotally and are provided for research and harm-reduction context only - not as a recommendation to use it. Cautious users start low, around 75-100 mg taken once, roughly 20-30 minutes before training, on a day with no other strong stimulants on board. For perspective, older European pharmaceutical products used far smaller unit doses of just 8-33 mg [PMID:29115866]. Individual response varies widely; blood pressure and heart rate should be assessed before any repeat exposure, and anyone with a cardiovascular history should not use it at all.

Intermediate protocol

Community 'standard' pre-workout dosing is commonly cited around 100-150 mg, often stacked with caffeine (typically 150-300 mg). Be clear about what that stack does: combining two sympathomimetics raises blood pressure and heart rate additively, increasing cardiovascular load. Commercial products that have actually been lab-tested contained octodrine in the range of 18-73 mg per serving [PMID:33755516] and about 72 mg in another analysis [PMID:29115866] - so a single 'scoop' may already deliver an intermediate dose before you add anything. This is acute, single-session use with off days between exposures, not a daily supplement.

Advanced protocol

Some experienced users report 150-200+ mg, but this tier is documented, not endorsed. Independent laboratory analysis found supplement products containing up to 112 mg of octodrine per serving - more than three times the highest historical pharmaceutical dose [PMID:29454882]. Doses in this range sharply increase the risk of hypertension, tachycardia, chest tightness, and hyperthermia [PMID:29461475]. There is no clinical evidence supporting these amounts, and reviewers note these stimulant cocktails 'have never been tested in humans and their safety is unknown' [PMID:33755516]. Given DMHA's structural kinship with DMAA - a stimulant investigated in connection with hemorrhagic stroke and sudden death - high-dose use carries real, unquantified cardiovascular risk.

Additional dosage notes

Treat any label dose with skepticism. Independent analyses repeatedly found the amount of octodrine in products differed from the label, ranged from 18 to 112 mg per serving, and was frequently combined with other prohibited stimulants (1,3-DMAA, 1,4-DMAA, 1,3-DMBA, oxilofrine, deterenol, higenamine) in undisclosed cocktails [PMID:29115866][PMID:33755516]. Two distinct isomers are sold under the 'DMHA' name, and products marketed as 'natural' (sourced from Aconitum or Kigelia africana) were shown to contain synthetic material - no DMHA was detectable in those plants, and synthesis byproducts plus a racemic enantiomer ratio confirmed a laboratory origin [PMID:29454882].

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05Prices

DMHA prices

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We do not track a vendor for DMHA yet, so this page states no price.

06Chemistry

Chemistry and structure

Molecular mass: 129.24 g/mol (free base; molecular formula C8H19N). Commonly supplied as a salt (e.g., hydrochloride or, historically, camphorsulfonate), which increases the labeled mass per dose.
Half-life: Not formally characterized in humans. After ingestion, octodrine is rapidly metabolized to heptaminol, which becomes the predominant compound detected in blood and urine within hours [PMID:39401652]. Users commonly report perceptible stimulant effects lasting roughly 3-6 hours, but this is anecdotal rather than measured pharmacokinetics.

08Questions

Frequently asked questions

Is DMHA the same as DMAA?

No, but they are close cousins. DMHA (octodrine; 2-amino-6-methylheptane / 1,5-dimethylhexylamine) is a structural analog of DMAA (1,3-dimethylamylamine) and was pushed as a 'legal' successor after DMAA was banned. Both are aliphatic-amine sympathomimetic stimulants with similar effects and similar cardiovascular concerns [PMID:29115866].

Is DMHA legal?

In the US it is not a lawful dietary ingredient - the FDA does not accept it and has issued warning letters, the same regulatory stance it took on DMAA, though it is still sold in gray-market pre-workouts. For competitive athletes it is prohibited in competition by WADA (octodrine and its metabolite heptaminol are listed specified stimulants) and has caused bans even when it entered the body through a contaminated supplement [PMID:39401652].

Is DMHA natural, from Kigelia africana or Aconitum?

No. Labels citing Aconitum or Kigelia as a 'natural' source are misleading. When researchers tested those plants, no DMHA was detectable, and the material in supplements showed synthetic byproducts and a racemic (roughly 50/50) enantiomer ratio consistent with laboratory synthesis [PMID:29454882].

How much DMHA is actually in a pre-workout?

It is unpredictable. Independent lab testing found anywhere from 18 mg to 112 mg of octodrine per serving, frequently different from the label, and often combined with other banned stimulants such as 1,3-DMAA, oxilofrine, or deterenol in undisclosed cocktails [PMID:29115866][PMID:33755516].

What are the main risks?

As a sympathomimetic it raises blood pressure and heart rate and can cause chest tightness, shortness of breath, hyperthermia, anxiety, and insomnia [PMID:29461475]. Given its similarity to DMAA - linked to hemorrhagic stroke and sudden death in case reports - serious cardiovascular events are a genuine concern, particularly at high doses or when stacked with other stimulants, and there is no long-term human safety data [PMID:29115866].

Will DMHA make me fail a drug test?

It can cause an anti-doping failure. Once ingested, octodrine is rapidly metabolized to heptaminol, and both are detectable in urine and appear on the WADA prohibited list. A 2024 case documented an athlete sanctioned for heptaminol traced back to a contaminated supplement [PMID:39401652]. It is a distinct molecule from amphetamine, but it is not something to rely on around any tested competition.

Price check

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