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MPA (Methiopropamine, MethioPropAmine), is a stimulant with a thiophene ring instead of a phenyl ring. MPA is short for Methiopropamine. This stimulant is the thiophene analog of methamphetamine. MPA is 1/4 the strength of amphetamine and 1/6 the strength of methamphetamine. So amphetamine is 4 times stronger than MPA while methamphetamine is 6 times stronger than MPA (Methiopropamine). MPA is sometimes called Speed Jr, Amp Jr, or Amphetamine jr. WARNING: Always start with lower doses due to differences between individual body weight, tolerance, metabolism, and personal sensitivity. Oral: Dosage Threshold 10 mg Light 20 - 30 mg Common 30 - 50 mg Strong 50 - 60 mg Heavy 60 mg + Duration: Total 6 - 10 hours Onset 30 - 60 minutes Peak 2 - 4 hours Offset 2 - 3 hours After effects 1 - 2 hours
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