Speed vs Meth: 10 Critical Questions People Ask About Amphetamine & Crystal Meth

1. What is the actual chemical difference between speed (amphetamine) and meth?

While both are phenethylamine stimulants, methamphetamine has an extra methyl group ($-CH_3$) attached to its nitrogen atom:

• Amphetamine ($C_9H_{13}N$): A primary amine, usually formulated as amphetamine sulfate.
• Methamphetamine ($C_{10}H_{15}N$): A secondary amine (N-methylamphetamine), usually formulated as a hydrochloride salt.

That extra methyl group makes meth far more lipophilic (fat-soluble), allowing it to penetrate the blood-brain barrier faster and trigger a massive dopamine surge with extended duration.

2. How do you tell amphetamine powder and crystal meth apart visually?

• Amphetamine Sulfate: Chalky, matte white powder that does not form translucent rock crystals.
• Crystal Methamphetamine HCl: Hard, transparent, shard-like rock crystals resembling shards of broken glass or coarse rock candy.

3. How long does speed last compared to crystal meth?

• Amphetamine (Speed): Peak effects 2–4 hours; total duration 6 to 8 hours.
• Crystal Methamphetamine: Peak effects 4–8 hours; total duration 12 to 24+ hours.

4. How does Simon's reagent differentiate speed from meth?

• Methamphetamine Reaction: Turns an instant, bright Cobalt Blue.
• Amphetamine Reaction: No Color Change / Clear (primary amine).