Ethylphenidate is structurally related to methylphenidate (Ritalin) and acts as a dopamine-norepinephrine reuptake inhibitor. It is notably caustic and damaging to nasal tissue, making insufflation particularly risky despite being common. The substance was banned in the UK in 2015 and placed in Schedule I in the United States in 2024. Users report less euphoria and more functional effects compared to other stimulants, but compulsive redosing is a significant risk. Overdose can cause cardiovascular complications and stimulant psychosis.
ЕФП molecular structure diagram from the DrugsPRO substance library.
Also known as: Ep, Epd, Ethylcaine, Ethylphenidate
Classification
Chemical: Phenethylamine
Chemical: Phenidate
Psychoactive: Stimulant
Tag: Common
Tag: Habit-Forming
Tag: Research-Chemical
Tag: substituted phenidate
Effects
Stimulation
Increased Heart Rate
Vasoconstriction
Teeth Grinding
Warm Fuzzy Body High
Chest Pain
Focus Enhancement
Euphoria
Time Distortion
Thought Acceleration
Analysis Enhancement
Wakefulness
Appetite Suppression
Dehydration
Increased Music Appreciation
Increased Sex Drive
Light Sensitivity
Increased Sexuality
Routes of Administration
Oral
Dosage
Threshold: 10 mg
Light: 15-20 mg
Common: 40-100 mg
Strong: 100-150 mg
Heavy: 150-200 mg
Duration
Onset: 0.7-2 h
Peak: 1-3 h
Offset: 2-3 h
After Effects: 1-6 h
Insufflated
Dosage
Threshold: 5 mg
Light: 10-15 mg
Common: 20-30 mg
Strong: 40-60 mg
Heavy: 80 mg
Duration
Onset: 0.08-0.17 h
Peak: 1-3 h
Offset: 2-3 h
After Effects: 1-6 h
Rectal
Dosage
Common: 15-30 mg
Heavy: 50-75 mg
Light: 5-15 mg
Strong: 30-50 mg
Threshold: 5 mg
Duration
Onset: 0.1-0.3 h
Harm Reduction
Check interactions before mixing substances, pay attention to dose spacing and hydration, and treat all dosage guidance as approximate rather than guaranteed safe.
Sources
Substance data is aggregated from the following public harm-reduction and reference sources.
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EPH - DrugsPRO ръководство за вещества
EPH: Ethylphenidate is structurally related to methylphenidate (Ritalin) and acts as a dopamine-norepinephrine reuptake inhibitor. It is notably caustic and damaging to nasal tissue, making insufflation particularly risky despite being common. The substance was banned in the UK in 2015 and placed in
