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Methylphenidate (Ritalin)

Stimulantprescriptionoral · inferred

Dopamine and norepinephrine reuptake inhibitor for ADHD. Short half-life of 2-3 hours for immediate release. Extended-release formulations provide 8-12 hour coverage.

Projected serum levels — 20 mg, twice daily

Methylphenidate (Ritalin)
Methylphenidate (Ritalin) modeled serum levels, 20 mg twice daily over 15 days Population-based pharmacokinetic estimate. Steady state reached after approximately 1 days. 0 0.50 1 1.5 2 Day 0 Day 4 Day 7 Day 11 Day 15 Time on a regular schedule ≈ steady state · day 1

Maintenance schedule: 20 mg twice daily (oral).

Modeled steady state after ~1 days: peak ≈ 1.1 mg, trough ≈ 0.14 mg body load. Population-based estimate over 15 days for a 20 mg dose at a 70 kg reference body mass — the interactive app scales curves to your doses, timing, and body mass.

Key facts

Category
Stimulant
Route modeled
Oral
Model confidence
inferred
Half-life
3 h
Common dose
20 mg
Suggested maximum
72 mg/day
Reference dose range
5–72 mg (single dose)
Suggested cadence
twice daily
Validated against
20 mg oral — Cmax 0.010 mg/L at 2 h

Documented interactions

  • danger
    d-Amphetamine + Methylphenidate (Ritalin) Stacked effects

    d-Amphetamine and Methylphenidate (Ritalin) both push the DAT, NET, and TAAR1 in the same direction.

  • danger
    Lisdexamfetamine (Vyvanse) + Methylphenidate (Ritalin) Stacked effects

    Lisdexamfetamine (Vyvanse) and Methylphenidate (Ritalin) both push the DAT, NET, and TAAR1 in the same direction.

  • warning
    Bromantane + Methylphenidate (Ritalin) Potentiation

    Bromantane increases dopamine synthesis while methylphenidate blocks dopamine reuptake. Combined dopaminergic excess raises cardiovascular risk and may cause anxiety, insomnia, or psychomotor…

  • caution
    Bupropion (Wellbutrin) + Methylphenidate (Ritalin) Potentiation

    Both increase catecholamines (norepinephrine/dopamine). Combined use may increase seizure risk and cardiovascular strain.

  • moderate
    Atomoxetine (Strattera) + Methylphenidate (Ritalin) Stacked effects

    Atomoxetine (Strattera) and Methylphenidate (Ritalin) both push the DAT and NET in the same direction.

  • moderate
    Cocaine + Methylphenidate (Ritalin) Stacked effects

    Cocaine and Methylphenidate (Ritalin) both push the DAT and NET in the same direction.

Serum checks 37 modeled interaction pairings for methylphenidate (ritalin) across your whole stack — absorption conflicts, enzyme inhibition, and nutrient depletion included.

Research behind this entry

  1. Methylphenidate for children and adolescents with attention deficit hyperactivity disorder (ADHD) Storebø OJ et al. · Cochrane Database of Systematic Reviews, 2015 DOI

    Cochrane review of 185 RCTs found methylphenidate improves teacher-rated ADHD symptoms and general behavior in children, though evidence quality was low due to risk of bias.

  2. Comparative efficacy and tolerability of medications for attention-deficit hyperactivity disorder in children, adolescents, and adults: a systematic review and network meta-analysis Cortese S et al. · Lancet Psychiatry, 2018 DOI

    Landmark network meta-analysis of 133 RCTs found methylphenidate was the preferred first-choice pharmacotherapy for ADHD in children/adolescents (best efficacy-tolerability balance); amphetamines preferred in adults.

2 published studies referenced in the app, each with a plain-language summary.