Caution

Alcohol raises methylphenidate levels and turns some into a second stimulant, while the pill hides how drunk you are.

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Expect a stronger effect, and drink less than you think you can.

Where the risk isTap for why
What “Caution” means

Carries risk that is worth understanding before combining. Reduce doses and do not use alone.

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The longer explanation

More than the usual stimulant-and-alcohol problem. In a lab study, drinking raised the peak level of methylphenidate in the blood by roughly 40%, and the liver turned part of it into ethylphenidate, a second stimulant. Meanwhile the stimulant hides how drunk you are. Expect a stronger effect than from the same pill sober, and drink less than you think you can.

Sources (2)
Other names
Alcohol
alc, booze, beer, wine, liquor, ethanol
Methylphenidate
ritalin, ritalin la, concerta, focalin, dexmethylphenidate, methylin
Not an amphetamine, but mixes much like one — most answers here are Adderall's
Also searched asalcohol and Ritalin, alcohol and ritalin la

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Can you mix Alcohol and Methylphenidate (Ritalin)?

MixSafe rates mixing Alcohol and Methylphenidate as "Caution" — carries risk that is worth understanding before combining. Reduce doses and do not use alone. Source: MixSafe research. Educational information, not medical advice.