MDMA

MDMA is an empathogen-entactogen that produces intense feelings of emotional closeness, euphoria, enhanced tactile sensation, and increased empathy. Used in sexual contexts for emotional connection and heightened physical sensitivity. Often sold as pressed pills ('ecstasy') or crystals/powder ('molly').

How It Works

MDMA primarily triggers massive serotonin release (and to a lesser extent, dopamine and norepinephrine) by reversing the serotonin transporter. Also triggers release of oxytocin, contributing to feelings of bonding and trust.

Legal Status

Schedule I in US. Class A in UK. Illegal in most countries. Breakthrough Therapy designation from FDA for PTSD treatment (as of 2023).

Dosage Guide (Oral)

Note: Rule of thumb: 1.5mg/kg body weight as a reasonable dose. Pressed pills vary wildly in content (50-300mg+) and may contain other substances. ALWAYS test with reagent kits. Redosing should be half the initial dose at most, and only once.

Organ System Impacts

cardiovascular — Moderate

Increased heart rate and blood pressure. Generally manageable in healthy individuals at normal doses. Risk increases significantly with exertion, heat, and dehydration. MDMA-related cardiovascular complications include arrhythmias and myocardial stress.

neurological — High

Massive serotonin release followed by depletion. Neurotoxic to serotonin neurons with repeated or heavy use. Chronic use causes memory problems, depression, anxiety, sleep disorders. Spacing use by 6-12 weeks is critical to allow serotonin system recovery.

ocular — Low

Dilated pupils. Nystagmus at higher doses. Blurred vision. Increased light sensitivity. Effects resolve within hours of use offset.

dermatological — Low

Flushing and profuse sweating from temperature dysregulation, especially in hot/dancing environments. No direct skin toxicity. Sweating-related dehydration risk in prolonged use.

respiratory — Low

Minimal direct respiratory effects. MDMA is not a respiratory depressant. Increased respiratory rate may occur from sympathomimetic effects, but no clinically significant respiratory toxicity.

hepatic — Moderate

MDMA is hepatotoxic. Most cases show mild transaminase elevation, but rare fulminant liver failure cases are documented. Risk increases substantially with high doses and repeated use. Alcohol co-use increases hepatotoxicity risk.

hematological — Low

MDMA causes serotonin-related platelet effects. Hyponatremia (low blood sodium) can occur from SIADH (syndrome of inappropriate antidiuretic hormone secretion) combined with excessive water intake. Careful fluid management is critical. Possible effect on immune function with repeated use.

renal — Moderate

MDMA causes antidiuretic hormone release (SIADH), promoting water retention. Combined with excessive water intake, this causes hyponatremia (water intoxication), which can be fatal. Conversely, dehydration from dancing and heat is an opposite risk. Careful fluid balance essential.

gastrointestinal — Low

Nausea on come-up is common, especially with oral route. Loss of appetite. Generally mild GI effects that resolve within hours. No significant GI toxicity at acute doses.

musculoskeletal — Low

Bruxism (jaw clenching, teeth grinding) is very common and can cause TMJ pain and dental wear. Muscle tension. Generally not dangerous but uncomfortable. Magnesium supplementation may help reduce symptoms.

Effects

Desired Effects

• Intense euphoria and emotional warmth
• Feelings of love, empathy, and connectedness
• Enhanced tactile sensation — touch feels incredible
• Increased sociability and openness
• Mild psychedelic visual enhancement
• Music sounds amazing
• Reduced anxiety and fear
• Heightened sexual and emotional intimacy

Negative Effects

• Jaw clenching and teeth grinding (bruxism)
• Nausea on come-up
• Overheating (hyperthermia)
• Dehydration or over-hydration (hyponatremia)
• Difficulty achieving orgasm or maintaining erection
• Comedown: depression, anxiety, irritability lasting 1-3 days
• Insomnia
• Memory impairment during and after

Rare but Serious

• Serotonin syndrome (especially if combined with other serotonergic drugs)
• Severe hyperthermia (can be fatal)
• Hyponatremia (water intoxication from over-drinking — can be fatal)
• Hepatotoxicity (rare but documented liver failure)
• Seizures
• Cardiac arrhythmia
• Serotonergic neurotoxicity (brain damage from heavy/frequent use)

Drug Interactions

Detection Times

MDMA can trigger positive results on amphetamine immunoassays and has its own confirmatory tests.

Urine

Detected on standard amphetamine panel or specific MDMA test. Detection window: up to 4 days.

Blood

Short blood detection window. Detection window: up to 2 days.

Hair

Hair follicle test detects use over months. Detection window: up to 90 days.

Saliva

Oral fluid test for recent use. Detection window: up to 2 days.

Harm Reduction Tips

• Use fentanyl test strips — fentanyl contamination has been found in MDMA supply

• Hydrate sensibly: about 500mL/hour if active, less if sedentary. Do NOT chug water — hyponatremia kills

• TEST YOUR STUFF with reagent kits (Marquis, Mecke, Simon's). Many 'ecstasy' pills contain other substances.

• Start with half a pill or 75mg and wait 90 minutes before considering more

• Wait at least 6-12 weeks between uses to protect serotonin neurons (the '3-month rule')

• Stay cool — take breaks from dancing, seek air-conditioned areas

• Magnesium supplements may help with jaw clenching

• Have chewing gum or a pacifier for bruxism

• Don't redose more than once, and only half the original dose

• The comedown is temporary. Serotonin replenishes over days. 5-HTP supplements (NOT on the same day) may help recovery.

• If on SSRIs: MDMA probably won't work. Do not take more to compensate.

Withdrawal Symptoms

Severity: Low

Comedown: 1-3 days after use. Serotonin recovery: 2-4 weeks with moderate use. Heavy/frequent users: full neurochemical recovery may take months.

Physical

• Fatigue and lethargy
• Muscle tension and jaw soreness
• Appetite changes
• Headaches

Psychological

• Mid-week depression ('Suicide Tuesday')
• Anxiety and irritability
• Difficulty concentrating
• Mood swings
• Insomnia
• Reduced serotonin — emotional flatness

Emergency Information

Call 911 If:

• Body temperature over 104°F / 40°C
• Seizures
• Loss of consciousness
• Extreme confusion, aggression, or delirium
• Muscle rigidity with high fever (serotonin syndrome)
• Signs of hyponatremia: headache, nausea, confusion, seizures after drinking lots of water

What To Do

1. Move to a cool area immediately
2. Remove excess clothing
3. Apply cool water to skin (armpits, neck, groin)
4. Sip (don't chug) cool water or electrolyte drinks
5. If person is overheating: this is a medical emergency — call 911
6. If serotonin syndrome suspected: stop all serotonergic substances, cool patient, call 911

What To Tell EMS

The patient took MDMA (ecstasy/molly). Report dose, time of ingestion, other substances. Key concerns: hyperthermia, serotonin syndrome, hyponatremia. Cooling measures are first priority. Dantrolene for severe hyperthermia. Cyproheptadine for serotonin syndrome.

Seek Help If

• Body temperature feels dangerously high and cooling measures aren't helping
• Severe headache that won't go away
• Confusion or disorientation beyond expected effects
• Muscle rigidity or involuntary jerking
• Not urinating despite drinking water (possible kidney issue)

Normal Discomfort

• Jaw clenching and teeth grinding
• Come-up nausea
• Feeling warm / sweating
• Dilated pupils
• 1-3 day mood dip after use