b'Substance AbuseChapter hapterSubstances are categorised according to their effects on the body. The category of a drug is mostly dependent upon its effect on the central nervous system. Drugs may be legal (e.g. alcohol, caffeine, cigarettes) or illegal (e.g. cannabis, ecstasy, cocaine, heroin). Some substances speed up nervous activity while others depress the nervous system. Some substances can cause multiple effects especially if they are combined with others.CategoriesStimulants (uppers such as amphetamines, cocaine, speed, ice).Depressants (downers such as alcohol, heroin, morphine).Hallucinogens (LSD - lysergic acid diethylamide or commonly called acid,PCPpsilocybin or also known as mushrooms, angel dust, peyote, buttons or mesc).TypesDesigner Drugs are modified variations of prescription substances such as amphetamines (Ecstasy) and narcotics.Produces rapid heart beat, extreme sweating, agitated state and paranoia followed by deepdepression.Anabolic Steroids are medical drugs prescribed for people having difficulty with weight gain. Many athletes revert to these drugs in order to enhance performance and to build up muscle.Chronic use can lead to aggressiveness, agitation, liver cancer, sterility.Marijuana comes from the plant cannabis sativa and is typically smoked.Causes rapid heart beat, dizziness, a feeling of elation, impaired judgement. Can lead to overbreathing and lung collapse.Over the Counter substances include paracetamol, cough mixtures, antihistamine sprays and other pain relievers.Cause a wide range of medical illness including bleeding within the stomach, uncontrolleddiarrhoea, dehydration, headaches, dizziness, altered and distorted conscious responses.Poisoning 147'