Crystal meth is short for crystal methamphetamine. It is just one form of the drug methamphetamine.

Methamphetamine is a white crystalline drug that people take by snorting it (inhaling through the nose), smoking it or injecting it with a needle. Some even take it orally, but all develop a strong desire to continue using it because the drug creates a false sense of happiness and well-being—a rush (strong feeling) of confidence, hyperactiveness and energy. One also experiences decreased appetite. These drug effects generally last from six to eight hours, but can last up to twenty-four hours.

The first experience might involve some pleasure, but from the start, methamphetamine begins to destroy the user’s life.
https://www.drugfreeworld.org/drugfacts/crystalmeth.html

Meth Harm
SHORT-TERM EFFECTS
• Loss of appetite
• Increased heart rate, blood pressure, body temperature
• Dilation of pupils
• Disturbed sleep patterns
• Nausea
• Bizarre, erratic, sometimes violent behavior
• Hallucinations, hyper-excitability, irritability
• Panic and psychosis
• Convulsions, seizures and death from high doses
LONG-TERM EFFECTS
• Permanent damage to blood vessels of heart and brain, high blood
pressure leading to heart attacks, strokes and death
• Liver, kidney and lung damage
• Destruction of tissues in nose if sniffed
• Respiratory (breathing) problems if smoked
• Infectious diseases and abscesses if injected
• Malnutrition, weight loss
• Severe tooth decay
• Disorientation, apathy, confused exhaustion
• Strong psychological dependence
• Psychosis
• Depression
• Damage to the brain similar to Alzheimer’s disease, stroke and epilepsy
https://www.drugfreeworld.org/FURL/data/www.drugfreeworld.org/files/truth-about-crystalmeth-booklet-en.pdf

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