MDA

Empathogen

MDA (3,4-methylenedioxyamphetamine) is a substituted amphetamine and entactogen closely related to MDMA. It produces emotional warmth and stimulation like MDMA but with stronger, more psychedelic-like perceptual effects and a notably longer duration.

Also known as: Sass, Sassafras, Sally, Tenamfetamine, Love Drug, 3,4-Methylenedioxyamphetamine

Written by Psymerge Editorial Team · Last updated June 4, 2026

Category: Empathogen
Onset: 30–60 minutes (oral)
Peak: 2–4 hours
Total duration: 6–8 hours (longer than MDMA)
After-effects: Comedown, fatigue and low mood possible over the following days

Overview

MDA, sometimes called "sass" or the "love drug", is the chemical parent of MDMA and was the first drug of this entactogen class to be studied. Like MDMA it is a monoamine releaser, but its effects skew more strongly toward the visual and perceptual alterations associated with classic psychedelics, and they last considerably longer.

In the only modern controlled human study, MDA produced robust increases in heart rate and blood pressure and self-reported effects that shared features with both MDMA and classic psychedelics, with effects still elevated at eight hours (Baggott et al., 2019). Because it is more stimulating, more serotonergically taxing, and longer-lasting than MDMA, MDA is generally considered to carry comparable or greater acute risk. This page is educational and is not an endorsement of use.

History & origins

MDA was first synthesized in the early twentieth century and investigated mid-century as a possible appetite suppressant and antidepressant, and in psychotherapy research, before being placed under international control. It became known recreationally as the "love drug" in the 1960s and was later largely displaced in popularity by its N-methylated relative, MDMA. It remains the subject of occasional clinical pharmacology research aimed at understanding entactogen and hallucinogen mechanisms (Baggott et al., 2010; 2019).

Pharmacology & how it works

MDA is a substituted amphetamine that releases serotonin, dopamine and norepinephrine, and also acts as an agonist at serotonin 5-HT2A receptors. This combination of monoamine release and direct 5-HT2A activity is thought to explain why MDA produces both MDMA-like emotional effects and stronger classic-psychedelic-like perceptual effects (Baggott et al., 2010; Nichols, 2016).

Chemical class: Substituted amphetamine (entactogen with psychedelic properties); methylenedioxyphenethylamine
Routes of administration: Oral (powder, capsule, or crystal)
Tolerance: Tolerance develops with repeated use and the valued effects diminish, discouraging frequent use; harm-reduction guidance suggests spacing uses by one to three months.

Pharmacokinetics

Taken orally, MDA typically begins within 30–60 minutes and lasts roughly 6–8 hours — longer than MDMA. In a controlled study its pharmacokinetics were similar to MDMA, indicating that its longer duration reflects pharmacodynamics rather than slower clearance (Baggott et al., 2019). It is partly metabolised to 4-hydroxy-3-methoxyamphetamine (HMA).

Effects

Physical Effects

Increased heart rate and blood pressure
Raised body temperature and sweating
Jaw clenching and teeth grinding (bruxism)
Pupil dilation
Reduced appetite
Muscle tension and restlessness
Nausea

Psychological Effects

Emotional warmth, empathy and openness
Euphoria and elevated mood
Increased sociability
Heightened sensory and tactile pleasure
Visual and perceptual alterations (more pronounced than with MDMA)
Anxiety or overstimulation at higher doses

Spiritual Effects

A sense of connection with others
Mystical-type or insight experiences reported at higher doses

Dosage Information

Low: 50–75 mg (oral)

Medium: 100–150 mg (oral)

High: 150–200+ mg (oral)

Controlled research has used roughly 1.4 mg per kilogram of body weight. MDA is longer-acting and more stimulating than MDMA, so redosing is especially risky. Powders are frequently adulterated or mis-sold, so test before use and start low. Educational only and not an endorsement of use.

Risks & safety

Contraindications

Like other entactogenic amphetamines, MDA strains the cardiovascular system and the body's temperature and fluid regulation. It is generally not advised for:

Cardiovascular conditions: heart disease, arrhythmias, or uncontrolled high blood pressure.
Psychiatric history: a personal or family history of psychosis or bipolar disorder.
Serotonergic medication: MAOIs, and more generally SSRIs/SNRIs and other serotonergic drugs (see interactions).
Other: pregnancy, and any condition worsened by raised body temperature or blood pressure.

Drug interactions

MDA floods the brain with serotonin, so the same dangerous combinations apply as for MDMA:

MAOIs (including the ayahuasca admixture harmine): risk of life-threatening serotonin syndrome or hypertensive crisis. Avoid entirely.
SSRIs/SNRIs and other serotonergic drugs (e.g. tramadol): increased serotonin-syndrome risk.
Stimulants: additive cardiovascular strain and overheating risk.
Alcohol: worsens dehydration and masks intoxication.

This list is not exhaustive; consult an up-to-date interaction resource and a clinician about any prescription medication (NIDA; TripSit).

Psychological distress & bad trips

Because MDA is more psychedelic than MDMA, it can more readily produce anxiety, confusion, frightening perceptual distortions, or 'bad trips', particularly at higher doses or in unsettled settings. As with MDMA, the days after use can bring low mood, irritability or fatigue linked to temporary serotonin depletion.

Rare but serious risks

The most serious acute risks are physical and overlap with those of MDMA, and may be heightened by MDA's longer duration and greater stimulation:

Hyperthermia (overheating): can be dangerous or fatal, especially with exertion in hot environments.
Hyponatremia (low blood sodium): from overdrinking water; risk appears greater in women.
Serotonin syndrome: particularly when combined with other serotonergic drugs.
Cardiovascular events: hazardous for people with existing heart conditions.
Adulterants: products sold as MDA may contain other, more dangerous compounds. Animal studies indicate MDA is serotonergically neurotoxic.

Vulnerable populations

Higher-risk groups generally advised to avoid MDA include:

People with heart conditions or high blood pressure.
People with a personal or family history of psychosis or bipolar disorder.
People taking serotonergic medication (SSRIs, SNRIs, MAOIs, and others).
Adolescents and young adults, whose brains are still developing.
Pregnant or breastfeeding people.

Dependency & addiction potential

Like MDMA, MDA has some potential for psychological dependence and is more reinforcing than the classic psychedelics, but it does not typically produce the compulsive use pattern of stimulants such as methamphetamine, and physical withdrawal is limited. Tolerance builds quickly and the valued effects fade with repeated use, which tends to discourage frequent use.

Overdose

Overdose is possible and can be fatal. As with MDMA, serious outcomes usually involve hyperthermia, hyponatremia, serotonin syndrome, or cardiovascular collapse rather than simply 'too high a dose', and risk rises with large doses, redosing, hot environments, mixing, and adulterated products. Emergency warning signs include very high temperature, rigid muscles or agitation, seizures, fainting, or chest pain — seek emergency help immediately and cool the person down.

Harm Reduction

Test your substance with a reagent kit and, where available, a drug-checking service; products sold as MDA are often adulterated or substituted.
Start low and account for MDA's longer duration — avoid redosing, which sharply increases risk.
Avoid overheating: take breaks from dancing and cool down in a ventilated area.
Hydrate sensibly (around half a litre of water per hour if active) but do not overdrink.
Never combine with MAOIs or other serotonergic drugs, and avoid mixing with alcohol or stimulants.
Space uses by one to three months to limit tolerance and cumulative serotonergic strain.
Stay with trusted people and learn the warning signs of overheating and serotonin syndrome.

Legal Status

Laws vary widely by country and change frequently, so we don't track legal status here to avoid showing outdated information.

Check current worldwide legal status on Psychedelic Alpha

Frequently asked questions

How is MDA different from MDMA?

MDA is the chemical parent of MDMA. Both are entactogens that release serotonin and produce emotional warmth, but MDA is more stimulating, produces stronger psychedelic-like visual and perceptual effects, and lasts noticeably longer (around 6–8 hours versus 3–6 for MDMA).

How long do MDA's effects last?

Taken orally, effects usually begin within 30–60 minutes and last roughly 6–8 hours, often followed by a comedown of low mood or fatigue over the following days.

Is MDA more dangerous than MDMA?

It carries the same major risks as MDMA — overheating, hyponatremia, serotonin syndrome and cardiovascular strain — and these may be heightened by its longer duration and stronger stimulation. Animal studies also indicate it is serotonergically neurotoxic.

Can you overdose on MDA?

Yes. Serious or fatal outcomes usually involve hyperthermia, hyponatremia, serotonin syndrome, or cardiovascular collapse. Risk rises with high doses, redosing, hot environments, mixing, and adulterated products. Seek emergency care for any serious symptoms.

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