Methamphetamine
Aliases: meth, desoxyn, tik
Summary
N-Methylamphetamine (also known as Methamphetamine, Ma, Meth, Glass, Ice, Shard, Crank, Tina, T, Tweak, Yaba, Shabu, and Crystal) is a classical stimulant substance of the amphetamine class. It is structurally related to amphetamine, however it crosses the blood-brain barrier more rapidly, due to its relatively high lipid solubility. It produces its effects by increasing levels of the neurotransmitters serotonin, dopamine, and norepinephrine in the brain.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Smoked BA >90% | 5-10mg | 10-20mg | 20-60mg | 60mg+ |
| Oral BA ~70% | 5-10mg | 10-25mg | 25-50mg | 50mg+ |
| Insufflated BA >90% | 5-10mg | 10-30mg | 30-60mg | 60mg+ |
| Rectal BA ~99% | 5-10mg | 10-30mg | 30-40mg | 40mg+ |
| Intravenous BA ~100% | 5-10mg | 10-20mg | 20-40mg | 40mg+ |
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Smoked | 0-1 min | - | 3-8 hrs | 1-3 hrs | 4-11.02 hrs |
| Oral | 19-70 min | 1-3 hrs | 10-12 hrs | 3-4 hrs | 14.32-20.17 hrs |
| Insufflated | 4-10 min | 3-4 min | 8-10 hrs | 2-4 hrs | 10.12-14.24 hrs |
| Rectal | 4-15 min | 3-4 min | 2-4 hrs | 3-5 hrs | - |
| Intravenous | 0-1 min | 1-1 min | 4-8 hrs | 3-4 hrs | 4-8 hrs |
Effect Profile
711 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Validated against 560 Erowid trip reports
- Weighted by importance: core (×3), major (×2), minor (×1)
Strong stimulation, euphoria, and focus with moderate anxiety/jitters
“The effect of that tiny bit was so intense I couldn't sleep for 3 days (I lay there at night eyes closed for 8+ hours strait, 2 nights in a row, totally awake, mind flying like crazy trying to sleep).”
“also i'm going to buy an over the counter pain killer because it helps alot, but i was wondering is it true caffeine enhances the euphoria and feeling of meth, because i've tried this once and...”
“If you have a decent size shot of good quality meth that is diluted half water half dope you will prolly get an amazing rush.”
“The way your heart beats and your head rushes, it's intense and amazing..”
“so anyways today i went to buy some, and instead of doing the whole bag of 20 dollars worth like i always do, for someone with no tolerance its too much, and doesn't make you feel anymore amazing...”
“Sometimes I will be productive......but sometimes I am taken hostage by my computer!”
“my only source of info on this was the internet on my phone so i searched google for how to properly inject meth, how to shoot up, how to hit a vein, all that stuff but i couldnt find any type of...”
“In the mean time I ruined our friendship because my desperate need to be with him was Appearant and it scared him.”
User Experience
Tolerance
Tolerance Decay
Acute tolerance builds rapidly over one or more long sessions, with noticeable blunting on subsequent doses; partial reversal occurs over 1–4 weeks if abstinent. Data are largely observational/anecdotal from user communities rather than controlled studies.
Cross-Tolerances
Effects
Aggregated from 560 Erowid and 151 Bluelight experience reports