 Dear students, in this module we are going to talk about the types of available drugs. Classifying drugs by chemical similarities is useful because of their somewhat similar impacts and risks associated with the health. An individual who is addict to the drugs is more likely to abuse or to be abused if it is chemically similar, identical or it can produce different effects if the chemicals are different. So the same treatment is often effective for chemically identical drugs. So let's see that what are the similarities and differences of these drugs. The number one is alcohol. Most widely abused substance across the world is alcohol. It is legal in number of countries across the globe and alcohol creates the feeling of euphoria and lure inhibition like beer, wine and liquor are the most common examples of alcohol. However, in Pakistan alcohol is officially not allowed is officially banned but yet it is considered that alcohol is unofficially or illegally being consumed in Pakistan. So here is the glimpse of alcohol and then we have the opioids. They are called the opiates. They are derived from the drug opium or the chemicals designed to mimic it. Opioids are the work by interacting with the neurotransmitters in the brain. It also is used as a serious painkiller. Opioids are some of the most addictive of all known substances. In the common form these opioids are available as heroin, fentanyl, oxycodone. So here is one of the opioids. Then we have the benzodiazepines. Benzos are a class of drugs that function by interacting with neurotransmitters, which is gamma aminobiotiric acid, which is commonly known as GABA. Each benzo impacts the body differently and benzos are prescribed to treat a wide variety of psychiatric disorders as well as sleep disorder conditions. Benzos are considered to be highly addictive. Examples of benzos can include ativon, volume and exon-ex. So here is one of the examples of benzos. And then we have the cannabinoids. Cannabinoids create the feeling of elated and in the situation state of ecstasy. And negatively it impacts the mental functioning and body functioning as well. It is most widely used drugs after alcohol. It is considered less addictive than the other drugs classifications. Examples of cannabinoids include hashish and marijuana. So here you see the one of the examples of cannabinoids. Then we have the barbitrates. Barbitrates act on the central nervous system by slowing down its functioning used for anesthesia and treatment of epilepsy and severe headache. These are considered highly addictive substance and common examples include ametol and luminal. So these are the different types of drugs which are identified and classified.