Drugs come in many forms, from lifesaving to life threatening. A drug is as substance that causes a temporary physiological or psychological change when introduced to the body. Legal forms of drugs include medicines, such as painkillers and antibiotics, alcohol and tobacco. Many drugs are illegal due to their harmful effects of the body, for example stimulants like cocaine, opioids and hallucinogens are all illegal in the majority of countries. The legality of Cannabinoids is being debated currently around the world.