Methamphetamine Is shaped similar to dopamine, which goes inside of the neuron and tricks the neuron into producing more dopamine

after repeated long-term stimulation, the brain will shut down dopamine receptors so that nothing can be received ever again.

Methamphetamine Changes the Brain. (n.d.). Retrieved March 07, 2016, from http://teens.drugabuse.gov/teachers/mind-over matter/methamphetamine/methamphetamine-changes-brain

SPECT scan of Methamphetamine user abuse. Digital image. Excalibur Healthcare. N.p., n.d. Web. 9 Mar. 2016.