Methamphetamines "Ice"


What are Methamphetamines?


Methamphetamines are a group of drugs commonly referred to as speed. They speed up or stimulate the activity of certain chemicals in the brain and are classed as stimulants.

Methamphetamine, also known as ice, is a potent form of amphetamine, and has been gaining popularity in Hong Kong since the early 1990s.


Amphetamines bought on the street are usually in the form of white powder, tablets or liquid in capsules. Ice is sold as transparent crystals. They can be swallowed, injected, smoked, or inhaled.


Effects of Using Methamphetamine


Effects of methamphetamines vary from person to person, depending on factors such as dosage, the way it is used, characteristics of the user, mood, previous experience with the drug and the setting.



Short-Term Effects


  • Headaches and dizziness;

  • Dry mouth;

  • Increased heart rate and blood pressure;

  • Reduced appetite;

  • Sleeplessness;

  • Increased talking

  • Anxiety and panic attacks;

  • Aggressiveness and threatening behaviour;

  • Become sensitive and easily irritated;

  • Hallucinations.



Long-Term Effects


  • Malnutrition;

  • Insomnia;

  • Reduced resistance to infection;

  • Skin lesions appear on body;

  • Irregular heart rate and high blood pressure;

  • Panic;

  • Depression;

  • Aggressiveness and threatening behaviour;

  • Hallucinations;

  • Psychosis (leading to schizophrenia in serious cases;

  • Tolerance;

  • Dependency.


For detailed information, please refer to the following websites:


Institute of Mental Health Castle Peak Hospital


Narcotics Division, Security Bureau: Anti-drug Information and Resources


Narcotics Division, Security Bureau: Anti-drug Resources for Teachers and Social Workers


Hong Kong Police Force: Types of Drugs