NutriStack
Alcohol and Methylphenidate, a caution.
Alcohol changes methylphenidate handling and can form ethylphenidate, an active transesterification metabolite. Ethanol can increase early methylphenidate exposure and may intensify euphoria, stimulation, impaired judgment, palpitations, and misuse risk. The combination is especially risky with immediate-release products, high methylphenidate doses, binge drinking, or a history of substance use disorder.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Alcohol and Methylphenidate
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Alcohol changes methylphenidate handling and can form ethylphenidate, an active transesterification metabolite. Ethanol can increase early methylphenidate exposure and may intensify euphoria, stimulation, impaired judgment, palpitations, and misuse risk. The combination is especially risky with immediate-release products, high methylphenidate doses, binge drinking, or a history of substance use disorder.
Mechanism. Ethanol competes with methylphenidate metabolism through carboxylesterase 1 and supports transesterification to ethylphenidate. This can increase parent-drug exposure and add a psychoactive stimulant metabolite while alcohol continues to impair judgment and coordination.
Recommendation. Avoid alcohol while taking methylphenidate, especially around dose times and with immediate-release formulations. Do not drink to intensify methylphenidate or take extra methylphenidate while drinking. Seek care for chest pain, fainting, severe agitation, confusion, or a racing or irregular heartbeat.
Sources (2)
- Markowitz JS, DeVane CL, Boulton DW, et al. Ethylphenidate formation in human subjects after the administration of a single dose of methylphenidate and ethanol. Drug Metab Dispos. 2000;28(6):620-624. PMID 10820132
- Zhu HJ, Patrick KS, Markowitz JS. Enantiospecific determination of DL-methylphenidate and DL-ethylphenidate in plasma by liquid chromatography-tandem mass spectrometry: application to human ethanol interactions. J Chromatogr B Analyt Technol Biomed Life Sci. 2011;879(11-12):783-788. PMID 21402502
Stack Score
How this pair moves the number.
Effect on the composite score
If both Alcohol and Methylphenidate are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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