Caution

Two prescription stimulants: the focus doesn't add up, but heart strain, anxiety and lost sleep do.

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Treat the second as a redose, not a new drug.

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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

Two prescription stimulants stacked, usually someone else's Adderall on top of a Ritalin prescription (or the reverse) to study longer. The focus does not add up, but heart rate, blood pressure, anxiety and lost sleep do. Treat the second as a redose, not a new drug.

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Other names
Amphetamines
adderall, speed, amphetamine, dexedrine, vyvanse, lisdexamfetamine
Prescription and street speed — Adderall, dexamphetamine
Methylphenidate
ritalin, ritalin la, concerta, focalin, dexmethylphenidate, methylin
Not an amphetamine, but mixes much like one — most answers here are Adderall's
Also searched asAdderall and Ritalin, speed and Ritalin, Adderall and ritalin la, speed and ritalin la

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Can you mix Amphetamines (Adderall) and Methylphenidate (Ritalin)?

MixSafe rates mixing Amphetamines 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.