Methamphetamine - How Meth acts within the body
Methamphetamine - Routes of Administration
Methamphetamine - Side Effects of Meth use
Methamphetamine - Statistics about Meth
Methamphetamine - References
Image 5 - Meth in its Tablet form

Methamphetamine can be smoked by inhaling the vapours produced when it is heated to 200-400oC in glass or aluminium pipe, the efficiency of this process is very high allowing 70% of the chemical to be absorbed by the brain.

While methamphetamine can be taken orally, like many other drugs it slows metabolic functions thus preventing its own absorption into the bloodstream, the peak blood plasma concentrations of methamphetamine are observed 3 hours after administration, lasting approximately 9 hours.

Intravenous injection of methamphetamine is very popular due to the sudden rush of euphoria witnessed almost immediately following injection. This method results in the highest blood plasma concentration of methamphetamine when compared to other routes of administration.
Image 3 - Meth in its powder form

Another popular method of assimilating the drug is through Insufflation, in which the powder form of the drug is inhaled through the nasal cavity where it is absorbed through the mucous membrane in the sinus cavity. This allows absorption straight into the bloodstream; however the effects last for a shorter period than with oral administration.