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Psychedex
Facts label

3-FEA Facts

Stimulant; Substituted amphetamine; Monoamine releasing agent

Dose and durationby route · individual sensitivity varies

Oral(mg)
Threshold< 15 mgLight20 – 35 mgCommon35 – 70 mgStrong70 – 90 mgHeavy90+ mg

Starts in 20 – 60 minLasts 4 – 6 hoursAfter-effects 6 – 12 hours

Also recorded: Insufflated. See full page: psychedex.org/substances/3-fea

Body and dependence

Acute toxicity
Moderate
Chronic toxicity
Moderate
Physical dependence
Moderate
Psychological dependence
Moderate
Withdrawal
Moderate
Compulsive redosing
Moderate

Tolerance

Builds
Moderate
Fully resets after
5 days
Carries over to
amphetamine; MDMA; cathinones; 4-FA; 3-FA; serotonergic compounds

Effectslikely at a common dose

Perception
Touch enhancement; +7 possible
Body
Stimulation; Insomnia; Vasoconstriction; Dry mouth; Appetite suppression; Pupil dilation; Wakefulness; +21 possible, including Temperature dysregulation, Heart rate perception changes, Excessive sweating
Thinking
Thought acceleration; Cognitive euphoria; +17 possible, including Compulsive redosing urge
Feeling
Euphoria; Empathy enhancement; +10 possible, including Anxiety, Anhedonia, Emotional lability
Self
none likely · 9 possible, including Craving, Ego inflation
Time
none likely · 2 possible
Awareness
none likely · 2 possible

Who shouldn't take it

Absolute
Cardiovascular disease; MAOI therapy; Tramadol
Relative
Seizure disorders; History of psychosis or mania; Hepatic impairment; Pregnancy; Concurrent serotonergic medications

Combinations61 recorded

Lethal (2)
MAOIs; Tramadol
Dangerous (33)
Alpha-2 adrenergic receptor antagonist; Anticholinergics; Atypical antipsychotics; Caffeine; Dopamine agonists; Ephedrine, Pseudoephedrine; Local anesthetics; MDMA, Amphetamines; MDMA, MDA; NDRIs (Wellbutrin); NRIs; Opioids; SNRIs; SSRIs; Stimulants; 5-HTP, Tryptophan; Antihistamines; Antipsychotics; Buspirone; Clonidine, Guanfacine; DXM; GHB, Baclofen; GHB, GBL; Ibogaine; and 9 more, see full page
Caution (23)
See full page: psychedex.org/substances/3-fea
Not graded (3)
Not listed never means safe.

Seek help immediately if

  • Chest pain; racing, pounding, or irregular heartbeat
  • Very high body temperature; heavy sweating; hot, flushed skin
  • Severe agitation, paranoia, panic, or confusion
  • Severe headache; muscle rigidity or twitching
  • Seizures
  • Signs of stroke — face drooping, one-sided weakness, slurred speech
  • Difficulty breathing; collapse or unconsciousness

What to do

  1. Call emergency services for chest pain, overheating, seizure, or unresponsiveness
  2. Move them to a cool, quiet place and reduce stimulation
  3. Cool the body — remove excess clothing, apply cool damp cloths, fan them
  4. Keep them calm; reassure — panic worsens the cardiovascular strain
  5. If seizing, protect from injury (don't restrain); recovery position afterward
  6. Monitor breathing and be ready to give rescue breaths / CPR

Most stimulant overdoses settle with cooling, a calm environment, and time. The medical danger is hyperthermia, cardiac events (arrhythmia, heart attack, stroke), and seizures — get help immediately if any appear.

988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE

psychedex.org/substances/3-fea · Version r1.a1 · Not medical adviceValues as of
On the printout