4-Methylphenmetrazine (mephenmetrazine, 4-MPM, PAL-747) is a recreational designer drug with stimulant effects.

It is a substituted phenylmorpholine derivative, closely related to better known drugs such as phenmetrazine and 3-fluorophenmetrazine.

It was first identified in Slovenia in 2015,[1][2] and has been shown to act as a monoamine releaser with some preference for serotonin release.

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