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Substances Effects Reports

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Community harm-reduction information. Not medical advice. Content is available under the CC BY-SA 4.0 license.

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4f-MPH

Contents

Dosage & Duration

Dosage

Threshold5 mg

Light5-10 mg

Moderate10-15 mg

Strong15-20 mg

Heavy20+ mg

Duration

Onset30-60 minutes

Peak2-4 hours

Offset1-2 hours

After Effects5-10 hours

Total4-8 hours

Reagent Testing

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