How long does 3-MMC last?

The total duration of 3-MMC via insufflated is 2.5 hours to 4.5 hours. Onset typically occurs within 5 minutes to 10 minutes. Peak effects last 1 hour to 1.5 hours.

3-MMC — SubstanceWiki

Substituted cathinone designer drug

3-Methylmethcathinone (3-MMC), also known as metaphedrone, is a designer drug from the substituted cathinone family. 3-MMC is a monoamine transporter substrate (a substance acted upon by monoamine transporters in the brain) that potently releases and inhibits the reuptake of dopamine and norepinephrine, as well as displaying moderate serotonin releasing activity.

3-Methylmethcathinone is a structural isomer of mephedrone (4-methylmethcathinone), and as such is illegal via blanket bans in many countries that have banned mephedrone. However, 3-MMC has still appeared on the recreational drug market as an alternative to mephedrone, and was first identified being sold in Sweden in 2012. Unlike some other synthetic cathinones, 3-MMC has been evaluated in at least one large mammal study.

How It Feels

The onset of 3-MMC is rapid and unmistakable. Within fifteen to thirty minutes of oral ingestion, a surging warmth floods upward through the torso and into the head. The heart accelerates, the skin flushes, and a wave of euphoria breaks over the mind with a force that announces this is no subtle compound. There is an immediate desire to talk, to move, to touch, and to be touched. The world suddenly feels brighter, warmer, and filled with people worth knowing.

As the experience builds to its peak over the next thirty to sixty minutes, 3-MMC reveals its dual nature as both stimulant and empathogen. The euphoria is rich and multi-layered: a dopaminergic confidence and energy braided with a serotonergic warmth and emotional openness. Conversation becomes effortless and deeply satisfying. Social inhibitions dissolve, and there is an almost magnetic pull toward connection and closeness. Touch takes on an extraordinary quality, soft surfaces feel luxurious, skin-to-skin contact radiates pleasure. Music sounds vivid and physically resonant, each beat landing in the body as much as the ears. The jaw clenches hard, the pupils dilate widely, and the body buzzes with a restless, pleasurable energy.

At the peak, 3-MMC is intensely rewarding, and this is precisely the source of its risk. The euphoria is potent enough to create a powerful desire for more as soon as it begins to wane. The compulsive redosing urge is among the strongest of any cathinone. Each redose brings diminishing returns but the same insistent craving. Physically, heart rate and blood pressure are significantly elevated, body temperature runs high, sweating is common, and the jaw tension can become genuinely painful. Despite these warning signals, the subjective experience remains so pleasurable that they are easily dismissed.

The comedown arrives within two to three hours and is proportional to the height of the peak. As the euphoria recedes, it is replaced by a restless flatness and a gnawing dissatisfaction. Energy drains away, mood drops, and a heavy tiredness settles over the body. If redosing has extended the session, the comedown intensifies accordingly: irritability, anxiety, jaw soreness, and an oppressive fatigue that resists sleep even as it demands it. The following day often carries a pronounced serotonergic hangover, a dull, joyless quality that reflects the neurochemical debt incurred during those brief, brilliant hours.

Subjective Effects

The effects listed below are based on the Subjective Effect Index (SEI), an open research literature based on anecdotal reports and personal analyses. They should be viewed with a healthy degree of skepticism. These effects will not necessarily occur in a predictable or reliable manner, although higher doses are more liable to induce the full spectrum of effects.

Physical Effects

Physical(15)

Appetite suppression— A distinct decrease in hunger and desire to eat, ranging from reduced interest in food to complete d...
Dehydration— A state of insufficient bodily hydration manifesting as persistent thirst, dry mouth, and physical d...
Dry mouth— A persistent, uncomfortable reduction in saliva production causing the mouth and throat to feel parc...
Increased heart rate— A noticeable acceleration of heartbeat that can range from a subtle awareness of one's pulse to a fo...
Increased libido— A marked enhancement of sexual desire, arousal, and sensitivity to erotic stimuli that can range fro...
Nausea— An uncomfortable sensation of queasiness and stomach discomfort that may or may not lead to vomiting...
Nystagmus— Rapid, involuntary oscillating movements of the eyes that cause vision to vibrate and blur, often ma...
Physical euphoria— An intensely pleasurable bodily sensation that can manifest as waves of warmth, tingling electricity...
Pupil dilation— A visible enlargement of the pupil diameter (mydriasis) that can range from subtle widening to drama...
Respiratory depression— A dangerous slowing and shallowing of breathing that can progress from barely noticeable reductions ...
Sedation— A state of deep physical and mental calming that manifests as a progressive desire to remain still, ...
Seizure— Uncontrolled brain electrical activity causing convulsions and loss of consciousness -- a life-threa...
Stimulation— A state of heightened physical and mental energy characterized by increased wakefulness, elevated mo...
Teeth grinding— An involuntary clenching and rhythmic grinding of the jaw muscles, known clinically as bruxism, that...
Vasoconstriction— A narrowing of blood vessels throughout the body that produces sensations of cold extremities, tingl...

Tactile(1)

Tactile enhancement— The sense of touch becomes dramatically heightened, making physical contact feel intensely pleasurab...

Cognitive & Perceptual Effects

Visual(5)

Colour enhancement— An intensification of the brightness, vividness, and saturation of colors in the external environmen...
Double vision— The visual experience of seeing a single object as two separate, overlapping images, similar to cros...
Pattern recognition enhancement— An increased ability and tendency to perceive meaningful patterns, faces, and images within ambiguou...
Symmetrical texture repetition— Textures appear to mirror and tessellate across surfaces in intricate, self-similar symmetrical patt...
Tracers— Moving objects leave visible trails of varying length and opacity behind them, similar to long-expos...

Cognitive

Pharmacology

Due to the lack of research regarding the substance, all discussion regarding the pharmacology of it is purely speculation based upon its structure and subjective effect similarities to other entactogens and stimulants such as mephedrone, amphetamine and 2-FMA.

3-MMC most likely acts as a serotonin-norepinephrine-dopamine reuptake inhibitor. This means that it effectively boosts the levels of the monoamine neurotransmitters serotonin, norepinephrine, and dopamine in the brain by binding to and partially blocking the transporter proteins that normally remove them from the synaptic cleft. This allows the neurotransmitters to accumulate in the brain, resulting in stimulating and euphoric effects.

Exposing compounds to the reagents gives a colour change which is indicative of the compound under test.

As with most research chemicals, the long-term effects of 3-MMC have not been researched extensively enough to provide accurate information of its risks and harm.

It is strongly recommended that one use harm reduction practices when using this substance.

As with other stimulants, the chronic use of 3-extremely addictive with a high potential for abuse and is capable of causing psychological dependence among certain users. When addiction has developed, cravings and withdrawal effects may occur if a person suddenly stops their usage. It is said that this compound is considerably more addictive than that of mephedrone.

Tolerance to many of the effects of 3-develops with prolonged and repeated use. This results in users having to administer increasingly large doses to achieve the same effects. After that,3 - 71 - 2 weeks to be back at baseline (in the absence of further consumption). 3-MMC presents cross-tolerance with Cross-all dopaminergic stimulants, meaning that after the consumption of 3-MMC all stimulants will have a reduced effect.

Serotonin syndrome risk
Austria: 3-MMC is illegal to possess, produce and sell under the NPSG (Neue-Psychoaktive-Substanzen-Gesetz Österreich).
Brazil: Possession, production and sale is illegal as it is listed on Portaria SVS/MS nº 344.
China: Since October 2015, 3-MMC has been banned (along with many other chemicals) in China. Due to this ban, many chemicals have become increasingly difficult to attain since the manufacturing was mainly done by Chinese chemical companies.
Czech Republic: 3-MMC is banned in the Czech Republic.
Germany: 3-MMC is controlled under Anlage I BtMG (Narcotics Act, Schedule I) as of December 13, 2014. It is illegal to manufacture, possess, import, export, buy, sell, procure or dispense it without a license.
Poland: 3-MMC is classified as a “II-P category drug” as of April 25th, 2024, making it illegal.
Sweden: 3-MMC is classified as a narcotic substance.
Switzerland: 3-MMC can be considered a controlled substance as a defined derivative of Cathinone under Verzeichnis E point 1. It is legal when used for scientific or industrial use.
Turkey:** 3-MMC is a classed as drug and is illegal to possess, produce, supply, or import.
The Netherlands:** 3-MMC was classified as a Lijst 2 (softdrug) drug in October 2021, Since April 2024 the goverment classified it as a Lijst 1 on the Opiumwet, making it a harddrug.
United Kingdom: 3-MMC is a Class B drug in the United Kingdom as a result of the cathinone catch-all clause.
United States:** 3-MMC is not formally listed but is categorized by the DEA as a Schedule I Positional Isomer.
Responsible use
Designer drug
Substituted cathinone
Stimulants
Entactogens
Mephedrone (4-MMC)
3-MMC (Wikipedia)
3-MMC (Isomer Design)
Discussion
3-MMC (3-Methylmethcathinone) Megathread (v1) (Bluelight)

Detection Methods

Exposing compounds to the reagents gives a colour change which is indicative of the compound under test.

As with most research chemicals, the long-term effects of 3-MMC have not been researched extensively enough to provide accurate information of its risks and harm.

It is strongly recommended that one use harm reduction practices when using this substance.

Dependence and abuse potential

Dangerous interactions
Serotonin syndrome risk
Austria: 3-MMC is illegal to possess, produce and sell under the NPSG (Neue-Psychoaktive-Substanzen-Gesetz Österreich).
Brazil: Possession, production and sale is illegal as it is listed on Portaria SVS/MS nº 344.
China: Since October 2015, 3-MMC has been banned (along with many other chemicals) in China. Due to this ban, many chemicals have become increasingly difficult to attain since the manufacturing was mainly done by Chinese chemical companies.
Czech Republic: 3-MMC is banned in the Czech Republic.
Germany: 3-MMC is controlled under Anlage I BtMG (Narcotics Act, Schedule I) as of December 13, 2014. It is illegal to manufacture, possess, import, export, buy, sell, procure or dispense it without a license.
Poland: 3-MMC is classified as a “II-P category drug” as of April 25th, 2024, making it illegal.
Sweden: 3-MMC is classified as a narcotic substance.
Switzerland: 3-MMC can be considered a controlled substance as a defined derivative of Cathinone under Verzeichnis E point 1. It is legal when used for scientific or industrial use.
Turkey:** 3-MMC is a classed as drug and is illegal to possess, produce, supply, or import.
The Netherlands:** 3-MMC was classified as a Lijst 2 (softdrug) drug in October 2021, Since April 2024 the goverment classified it as a Lijst 1 on the Opiumwet, making it a harddrug.
United Kingdom: 3-MMC is a Class B drug in the United Kingdom as a result of the cathinone catch-all clause.
United States:** 3-MMC is not formally listed but is categorized by the DEA as a Schedule I Positional Isomer.
Responsible use
Designer drug
Substituted cathinone
Stimulants
Entactogens
Mephedrone (4-MMC)
3-MMC (Wikipedia)
3-MMC (Isomer Design)
Discussion
3-MMC (3-Methylmethcathinone) Megathread (v1) (Bluelight)

Interactions

Substance	Status	Note
25x-NBOH	Dangerous	—
25x-NBOMe	Dangerous	—
Atropa belladonna	Dangerous	Extreme cardiovascular strain from anticholinergic and stimulant effects combined
Datura	Dangerous	Extreme cardiovascular strain from anticholinergic and stimulant effects combined
Diphenhydramine	Dangerous	Extreme cardiovascular strain from anticholinergic and stimulant effects combined
Harmala alkaloid	Dangerous	Risk of hypertensive crisis and serotonin syndrome; potentially fatal combination
Peganum harmala	Dangerous	Risk of hypertensive crisis and serotonin syndrome; potentially fatal combination
MDMA	Unsafe	—
1,3-Butanediol	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
25E-NBOH	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
2C-T	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
2C-T-2	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
2C-T-21	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
2C-T-7	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
3-FMA	Caution	Increased cardiovascular strain and neurotoxicity risk
4-MMC	Caution	Increased cardiovascular strain and neurotoxicity risk
8-Chlorotheophylline	Caution	Increased cardiovascular strain and neurotoxicity risk
Adrafinil	Caution	Increased cardiovascular strain and neurotoxicity risk
Allylescaline	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Ayahuasca	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Benzydamine	Caution	Increased cardiovascular strain and neurotoxicity risk
Bromantane	Caution	Increased cardiovascular strain and neurotoxicity risk
Cake	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Deschloroetizolam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Desomorphine	Caution	Stimulants mask opioid sedation, increasing overdose risk when the stimulant wears off
DET	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Dichloropane	Caution	Increased cardiovascular strain and neurotoxicity risk
Diclazepam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
DiPT	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
DOM	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
DPT	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Efavirenz	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Ephedrine	Caution	Increased cardiovascular strain and neurotoxicity risk
EPT	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Eszopiclone	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Etizolam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Flubromazepam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Flubromazolam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Flunitrazepam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Flunitrazolam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Gaboxadol	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Hexedrone	Caution	Increased cardiovascular strain and neurotoxicity risk
Ibogaine	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Lorazepam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Mephenaqualone	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
MET	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Methallylescaline	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Methcathinone	Caution	Increased cardiovascular strain and neurotoxicity risk
Metizolam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Midazolam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
MiPT	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
MPT	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Naloxone	Caution	Stimulants mask opioid sedation, increasing overdose risk when the stimulant wears off
Nicotine	Caution	Increased cardiovascular strain and neurotoxicity risk
Nifoxipam	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Oxiracetam	Caution	Increased cardiovascular strain and neurotoxicity risk
Pentobarbital	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Phenobarbital	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Phenylpiracetam	Caution	Increased cardiovascular strain and neurotoxicity risk
Psilocybin Mushrooms	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Rhodiola Rosea	Caution	Increased cardiovascular strain and neurotoxicity risk
SAMe	Caution	Masks the effects of each drug; risk of overdosing when one wears off before the other
Alcohol	Uncertain	—

Showing 63 key interactions out of 64 total.

Toxicity & Safety

Further information: Research chemicals § Toxicity and harm potential As with most research chemicals, the long-term effects of 3-MMC have not been researched extensively enough to provide accurate information of its risks and harm.

It is strongly recommended that one use harm reduction practices when using this substance.

Dependence and abuse potential

As with other stimulants, the chronic use of 3-MMC can be considered extremely addictive with a high potential for abuse and is capable of causing psychological dependence among certain users. When addiction has developed, cravings and withdrawal effects may occur if a person suddenly stops their usage. It is said that this compound is considerably more addictive than that of mephedrone.

Tolerance to many of the effects of 3-MMC develops with prolonged and repeated use. This results in users having to administer increasingly large doses to achieve the same effects. After that, it takes about 3 - 7 days for the tolerance to be reduced to half and 1 - 2 weeks to be back at baseline (in the absence of further consumption). 3-MMC presents cross-tolerance with all dopaminergic stimulants, meaning that after the consumption of 3-MMC all stimulants will have a reduced effect.

Dangerous interactions

Warning: Many psychoactive substances that are reasonably safe to use on their own can suddenly become dangerous and even life-threatening when combined with certain other substances. The following list provides some known dangerous interactions (although it is not guaranteed to include all of them).

Always conduct independent research (e.g. Google, DuckDuckGo, PubMed) to ensure that a combination of two or more substances is safe to consume. Some of the listed interactions have been sourced from TripSit.

25x-NBOMe & 25x-NBOH - 25x compounds are highly stimulating and physically straining. Combinations with 3-MMC should be strictly avoided due to the risk of excessive stimulation and heart strain. This can result in increased blood pressure, vasoconstriction, panic attacks, thought loops, seizures, and heart failure in extreme cases.
Alcohol - Combining alcohol with stimulants can be dangerous due to the risk of accidental over-intoxication. Stimulants mask alcohol's depressant effects, which is what most people use to assess their degree of intoxication. Once the stimulant wears off, the depressant effects will be left unopposed, which can result in blackouts and severe respiratory depression. If mixing, the user should strictly limit themselves to only drinking a certain amount of alcohol per hour.
DXM - Combinations with DXM should be avoided due to its inhibiting effects on serotonin and norepinephrine reuptake. There is an increased risk of panic attacks and hypertensive crisis, or serotonin syndrome with serotonin releasers (MDMA, methylone, mephedrone, etc.). Monitor blood pressure carefully and avoid strenuous physical activity.
MDMA - Any neurotoxic effects of MDMA are likely to be increased when other stimulants are present. There is also a risk of excessive blood pressure and heart strain (cardiotoxicity).
MXE - Some reports suggest combinations with MXE may dangerously increase blood pressure and increase the risk of mania and psychosis.
Dissociatives - Both classes carry a risk of delusions, mania and psychosis, and these risk may be multiplied when combined.
Stimulants - 3-MMC may be dangerous to combine with other stimulants like cocaine as they can increase one's heart rate and blood pressure to dangerous levels.
Tramadol - Tramadol is known to lower the seizure threshold and combinations with stimulants may further increase this risk.

Serotonin syndrome risk

Combinations with the following substances can cause dangerously high serotonin levels. Serotonin syndrome requires immediate medical attention and can be fatal if left untreated.

MAOIs - Such as banisteriopsis caapi, syrian rue, phenelzine, selegiline, and moclobemide.
Serotonin releasers - Such as MDMA, 4-FA, methamphetamine, methylone and αMT.
SSRIs - Such as citalopram and sertraline
SNRIs - Such as tramadol and venlafaxine
5-HTP

Addiction Potential

extremely addictive with a high potential for abuse

Overdose Information

Stimulant overdose from 3-MMC is a medical emergency primarily involving cardiovascular and neurological toxicity.

Signs of overdose: Extremely rapid or irregular heartbeat, chest pain, severe headache, dangerously elevated body temperature, seizures, agitation progressing to psychosis, confusion, and loss of consciousness.Emergency response:

Call emergency services immediately
Keep the person cool (remove excess clothing, apply cool water)
If seizures occur, protect the head and clear the area of hard objects
If the person loses consciousness, place in recovery position
Do not give the person more stimulants, caffeine, or depressants unless directed by medical professionalsPrevention: Pre-measure doses. Avoid redosing. Stay hydrated (but don't overhydrate). Take breaks from physical activity. Monitor heart rate if possible. Have someone present who can recognize warning signs.

3-MMC

Quick Dosage

Dosage

insufflated

intravenous

oral

Duration

insufflated

intravenous

oral

How It Feels

Subjective Effects

Physical Effects

Physical(15)

Tactile(1)

Cognitive & Perceptual Effects

Visual(5)

Cognitive

Pharmacology

Detection Methods

Interactions

History

Harm Reduction

Toxicity & Safety

Addiction Potential

Overdose Information

Dangerous Interactions

Tolerance

Cross-tolerances

Legal Status

Experience Reports (2)

Tips (6)

Community Discussions (2)

See Also

References (4)

Frequently Asked Questions

Auditory(2)

Full	develops with prolonged and repeated use
Half	3 - 7 days
Zero	1 - 2 weeks