Combination

Mixing Mephedrone (meow) and Methamphetamine (meth)

StimulantStimulant
Verdict

Caution

Two stimulants strain the heart and brain, usually over a long session of redosing. Decide the total for the night in advance.

Additive cardiovascular and neurotoxic strain from two stimulants, with a long, heavily-redosed session the typical pattern.

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.

Headspace vs physical risk

Can you mix Mephedrone (meow) and Methamphetamine (meth)?

MixSafe rates mixing Mephedrone and Methamphetamine as "Caution" — carries risk that is worth understanding before combining. Reduce doses and do not use alone. No interaction specific to Mephedrone and Methamphetamine is documented; this is the default for Amphetamines. Source: MixSafe research. Educational information, not medical advice.

This is a class-level answer, inherited from Amphetamines. Nothing specific to this exact pair is documented, so treat it as the default for the class rather than a measurement of these two drugs together.

Methamphetamine
Roughly twice as potent, and lasts three to four times as long
Mephedrone also called
4-mmc, 4mmc, meow, m-cat, 4-methylmethcathinone, bath salts
Methamphetamine also called
meth, crystal, crystal meth, ice, tina, shard
Source

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