Combination

Mixing Amphetamines and Methamphetamine

StimulantStimulant
Amphetamines also called
adderall, speed, amphetamine, dexedrine, vyvanse, lisdexamfetamine
Methamphetamine also called
meth, crystal, crystal meth, ice, tina, shard
Verdict

Caution

Roughly the same molecule doing the same thing, so this is mostly a redose question wearing a combination's clothes. Methamphetamine is about twice as potent and lasts 8-24 hours against amphetamine's 4-6, so adding prescription stimulant to a meth session extends cardiovascular strain well past where either drug's effects are still worth having.

Risk / Physical

The risk here is to the body — breathing, heart, temperature or organs. Set limits before you start, because this kind of harm does not announce itself in time to react.

Can you mix Amphetamines and Methamphetamine?

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

Amphetamines
Prescription and street speed — Adderall, dexamphetamine
Methamphetamine
Roughly twice as potent, and lasts three to four times as long
Source

Checking more than two?

Combinations of three or more carry risks that no pair-by-pair chart can show. The checker rates every pair at once and flags the whole-mix ones on top.

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Related combinations

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Rated caution. Educational information only, not medical advice. Absence of a documented interaction is not evidence of safety.