The way meth enters the body determines its effects. The crystalline powder can be snorted, eaten, or smoked. It can
be dissolved in a beverage and drunk, or dissolved in water or alcohol and injected. The rock-like form of meth is smoked. Pills are swallowed.7
Smoking and injecting meth delivers a fast and intoxicating high. Meth's effects are felt within 10 to 30 seconds. Users describe this immediate and intense rush or "flash" as extremely pleasurable. This sensation lasts only a few minutes, but the meth user can still feel a sense of euphoric intoxication for 12 to 14 hours or more. After the initial rush, there is typically a state of high agitation known as "tweaking" that in some individuals can lead to rages and violent behavior.6, 7 14, 24
When crystal meth is heated, it gives off vapors (smoke) that can be inhaled through the lungs. Ice is smoked in a glass pipe or an empty light bulb, and it leaves either a milky or black residue inside the glass, depending on the way it was made. The residue left in the glass can be re-smoked.2, 13
When meth in crystalline powder form is heated, it easily dissolves in water or alcohol and can then be injected. Meth injection is as risky as using any other intravenous drug. Sharing needles can spread HIV, the virus that causes AIDS (acquired immunodeficiency syndrome), as well as hepatitis B and C.11, 13, 16
These routes bypass the digestive process and directly travel to the central nervous system (the brain) via the bloodstream. Because of this fast-acting and direct route to the nervous system, high doses of inhaled and injected drugs can be
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