Isopropylphenidate Facts
Stimulant;
Description
Isopropylphenidate — also known as IPH — is a synthetic stimulant of the substituted phenidate class. It blocks the brain's dopamine recycling system, raising dopamine levels in the circuits that drive motivation and attention.[1]
Subjective effects include enhanced focus, faster thinking, increased motivation, and mild cognitive euphoria. The experience feels like clean mental drive — task engagement and mental clarity without the physical intensity or emotional warmth of amphetamines.
IPH carries moderate psychological dependence liability; no lethal dose has been established in any species.safety citation needed Cardiovascular strain — elevated heart rate and blood pressure — is the primary acute risk, scaling with dose; combining it with stimulants or MAOIs amplifies this danger.[2]
Dose and durationby route · individual sensitivity varies
Starts in 10 – 30 minLasts 3.5 – 6 hoursAfter-effects 1 – 4 hours
Body and dependence
- Acute toxicity
- Moderate
- Chronic toxicity
- Moderate
- Physical dependence
- Low
- Psychological dependence
- Moderate
- Withdrawal
- Mild
- Compulsive redosing
- Moderate
Tolerance
- Builds
- Moderate
- Fully resets after
- 10.5 days
- Carries over to
- methylphenidate;
amphetamines; cocaine; other dopaminergic stimulants
Effectslikely at a common dose
- Perception
- none likely · 5 possible
- Body
- Appetite suppression;
Insomnia; Stimulation; Wakefulness; +18 possible, including Heart rate perception changes, Muscle tension, Excessive sweating - Thinking
- none likely · 20 possible, including Compulsive redosing urge, Thought loops
- Feeling
- none likely · 9 possible, including Anxiety, Anhedonia, Depression
- Self
- none likely · 10 possible, including Craving, Ego inflation, Compulsive repetitive behavior
- Awareness
- none likely · 1 possible
Who shouldn't take it
Combinations62 recorded
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
- Call emergency services for chest pain, overheating, seizure, or unresponsiveness
- Move them to a cool, quiet place and reduce stimulation
- Cool the body — remove excess clothing, apply cool damp cloths, fan them
- Keep them calm; reassure — panic worsens the cardiovascular strain
- If seizing, protect from injury (don't restrain); recovery position afterward
- 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
References
- [1]^Markowitz JS, Zhu HJ, Patrick KS (2013) Isopropylphenidate: an ester homolog of methylphenidate with sustained and selective dopaminergic activity and reduced drug interaction liability — Journal of Child and Adolescent Psychopharmacology doi:10.1089/cap.2013.0074
- [2]^Spiller HA, Hays HL, Aleguas A (2013) Overdose of drugs for attention-deficit hyperactivity disorder: clinical presentation, mechanisms of toxicity, and management. — CNS Drugs doi:10.1007/s40263-013-0084-8