Skip to main content
Psychedex
Article

NEP Facts

Stimulant; Substituted cathinone; Norepinephrine-dopamine reuptake inhibitor

Description

NEP (N-ethylpentedrone) is a synthetic stimulant of the substituted cathinone class. It blocks the brain's clearance of dopamine and norepinephrine, producing stimulant arousal without the emotional warmth of serotonin-active compounds.[1][2]

Subjective effects include euphoria, increased energy, appetite suppression, heightened focus, and wakefulness. The experience is a functional stimulant drive — clean arousal without emotional warmth, closer to cocaine in character than to empathogenic cathinones like mephedrone.[3]

NEP carries high abuse liability — repeated use rewires the brain's reward circuits, intensifying the urge to redose while reducing the pleasure obtained.[4] Overdose has caused muscle breakdown, kidney failure, and coma; combining it with stimulants or MAOIs sharply raises cardiovascular risk.

Dose and durationby route · individual sensitivity varies

Oral(mg)
Threshold< 5 mgLight10 – 25 mgCommon25 – 50 mgStrong50 – 75 mgHeavy90+ mg

Starts in 15 – 45 minLasts 4 – 8 hoursAfter-effects 8 – 18 hours

Body and dependence

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

Tolerance

Builds
Moderate
Fully resets after
10 days
Carries over to
cocaine; amphetamine; methamphetamine; pentedrone; n-ethylhexedrone

Effectslikely at a common dose

Perception
none likely · 8 possible, including Tinnitus
Body
Stimulation; Vasoconstriction; Appetite suppression; Wakefulness; Dry mouth; Insomnia; Pupil dilation; Restlessness; +19 possible, including Dehydration sensation, Excessive sweating, Heart rate perception changes
Thinking
Cognitive euphoria; Thought acceleration; Compulsive redosing urge; +24 possible, including Cognitive dysphoria, Decision impairment, Thought loops
Feeling
Euphoria; +9 possible, including Anxiety, Depression, Anhedonia
Self
none likely · 10 possible, including Craving, Compulsive repetitive behavior, Ego inflation
Time
none likely · 1 possible
Awareness
none likely · 1 possible

Who shouldn't take it

Absolute
Cardiovascular disease; Pregnancy; MAOI use
Relative
Seizure disorders; Psychotic disorders; Bipolar disorder; Renal impairment

Combinations61 recorded

Lethal (1)
Tramadol
Dangerous (29)
Amphetamines; Ephedrine, Pseudoephedrine; Local anesthetics; MAOIs; MDMA, Amphetamines; NRIs; Stimulants; Alpha-2 adrenergic receptor antagonist; Anticholinergics; Antipsychotics; Caffeine; Clonidine, Guanfacine; Dopamine agonists; GHB, Baclofen; GHB, GBL; Ibogaine; Ketamine, DXM, PCP; Lithium; MDMA, MDA; NSAIDs; Opioids; Poppers (Alkyl nitrites); Poppers, Nitrates; Psychedelics; and 5 more, see full page
Caution (27)
See full page: psychedex.org/substances/nep
Not graded (4)
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

Version r1 · Not medical advice

References

  1. [1]
    ^Simmler LD, Rickli A, Hoener MC, Liechti ME (2014) Monoamine transporter and receptor interaction profiles of a new series of designer cathinones — Neuropharmacology doi:10.1016/j.neuropharm.2013.11.008
  2. [2]
    ^Kolaczynska KE, Thomann J, Hoener MC, Liechti ME (2021) The Pharmacological Profile of Second Generation Pyrovalerone Cathinones and Related Cathinone Derivative. — International journal of molecular sciences doi:10.3390/ijms22158277
  3. [3]
    ^Drevin G, Gaulier JM, Hakim F, et al. (2024) Synthetic cathinones in drug-facilitated sexual assault: A case report involving N-ethylpentedrone — Forensic science international doi:10.1016/j.forsciint.2024.112030
  4. [4]
    ^Espinosa-Velasco M, Reguilón MD, Bellot M, et al. (2022) Repeated administration of N-ethyl-pentedrone induces increased aggression and impairs social exploration after withdrawal in mice — Progress in neuro-psychopharmacology & biological psychiatry doi:10.1016/j.pnpbp.2022.110562
Print version
Report an issue