Chronic high-dose use can induce states of anxiety & paranoia, delusions, thought disorganization, psychosis, and violent behavior. Subjective effects include motivation enhancement, stamina enhancement, appetite suppression, increased libido, and euphoria. Along with heroin and cocaine, it has a notorious reputation as a dangerous and highly addictive 'street drug'. Methamphetamine was first synthesized from ephedrine in 1893 by Japanese chemist Nagayoshi Nagai. It produces its effects by increasing levels of the neurotransmitters serotonin, dopamine, and norepinephrine in the brain.

It is structurally related to amphetamine, however it crosses the blood-brain barrier more rapidly, due to its relatively high lipid solubility. N-Methylamphetamine (also known as Methamphetamine, Ma, Meth, Glass, Ice, Shard, Crank, Tina, T, Tweak, Yaba, and Crystal ) is a classical stimulant substance of the amphetamine class. It is not a recommendation and should be verified with other sources for accuracy. See responsible use section.Ĥ - 7 hours Up to 12h for irregular users.Ħ - 10 hours Up to 18h for irregular users.Ĥ - 8 hours Up to 18h for irregular users.ĭISCLAIMER: PW's dosage information is gathered from users and resources for educational purposes only. WARNING: Always start with lower doses due to differences between individual body weight, tolerance, metabolism, and personal sensitivity. Methamphetamine, Meth, Crystal, Desoxyn, Speed, Ma, Ice, Glass, Shard, Tina, T, Tweak, Crank, Shabu, Yaba

Amphetamine effects