Mixing Mephedrone (meow) and Tianeptine (gas station heroin)

Caution

The stimulant hides how much the opioid is slowing you; if it wears off first, breathing can stop.

Do this

Take less of each than usual, do not use alone, and keep naloxone nearby.

General answer for Opioids: nothing specific to these two is documented.

Where the risk isTap for why
What “Caution” means

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

How the ratings work
The longer explanation

Stimulants increase respiration rate allowing a higher dose of opiates. If the stimulant wears off first then the opiate may overcome the patient and cause respiratory arrest.

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Other names
Mephedrone
4-mmc, 4mmc, meow, m-cat, 4-methylmethcathinone, bath salts
Tianeptine
gas station heroin, tianaa, zaza red, neptune's fix, pegasus, td red
Sold as a supplement — at the doses people take, a full opioid
Also searched asmeow and gas station heroin, m-cat and gas station heroin, meow and tianaa, m-cat and tianaa
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Related combinations

Mephedrone withWhat not to mix with Mephedrone →
Tianeptine withWhat not to mix with Tianeptine →
All combinations →

Can you mix Mephedrone (meow) and Tianeptine (gas station heroin)?

MixSafe rates mixing Mephedrone and Tianeptine as "Caution" — carries risk that is worth understanding before combining. Reduce doses and do not use alone. No interaction specific to Mephedrone and Tianeptine is documented; this is the default for Opioids. Source: TripSit drug combination chart, retrieved 2026-08-20. Educational information, not medical advice.

This is a class-level answer, inherited from Opioids. 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.