Drugs are chemicals that effect the body and brain. Different drug have different effects. Some effects of drugs include health consequences that are long lasting and even permanent. They can even continue after a person has stopped taking the substance. There are a few ways a person can take drugs, including injection, inhalation and ingestion. The effects of the drug on the body can depend on the way in which the abuse drug is delivered, for example: the injection of drug directly into the bloodstream have an immediate impact, while ingestion has a delayed effect. But all drugs of abuse effect the brain. They cause large amounts of dopamine, a neurotransmitter that helps regulate our emotions, motivation and feelings of pleasure, to flood the brain, causing a "high" . Eventually, drygs can change how the brain works and interfere with a person's ability to make choices, leading to intense craving and compulsive drun use. Over time , this behaviour can turn into a substance dependency, or drug and alcohol addiction.
The good news in, substance use disorders are treatable.