Heroin

Heroin is a semisynthetic substance derived from morphine.  Among the most powerful painkillers known, it is a highly dangerous drug because it causes severe psychological and physical addiction.

 Upon entering the brain, heroin acts in areas involved in pain perception and gratification, producing a surge of euphoria ("rush") accompanied by dry mouth, hot red skin, heavy limbs and mental confusion with a sensation of flying, which alternates between being fully awake or asleep.

Short- and long-term risks are:

• Infections such as hepatitis, pneumonia and AIDS.
• Extreme weight loss, constipation, psychological disorders and cardiovascular diseases.
• Severe dependence and tolerance.