1. General understanding of drugs Definition : Drug is all material single/mixed used by all creatures for the inside and outside, to prevent, alleviate or cure disease.Which According to the law, what is meant by medicine is a substance or ingredients intended to be used to diagnose, prevent, reduce, eliminate, cure disease or symptoms of disease, injury or physical or spiritual disorders in humans or animals, to improve the body or parts of the body. human body. Medicines, in plant, animal and mineral forms, have been around much longer than humans. Diseases in humans and their instinct for survival over the years lead to discoveries.The use of medicines, although in simple form there is no doubt, has been going on since long before written history, because the instinct of primitive people was to relieve the pain of wounds by soaking them in cold water or placing fresh leaves on the wound or covering it. with mud, just based on trust. Primitive people learned from experience and found that one method of treatment was more effective than another, from this initial basis the work of therapy with medicine began. 1.Ready-made medicines are medicines in pure or mixed form in the form of powder, liquid, ointment, tablets, pills, suppositories or other forms that are technically in accordance with the Indonesian Pharmacopoeia or other books stipulated by the government. 2.Patent medicine is a finished medicine with a trade name registered in the name of the authorized manufacturer and sold in the original packaging from the factory that produces it. 3.Original medicine is medicine obtained directly from natural ingredients, processed in a simple way based on experience and used in traditional medicine. 4.Essential Medicines are medicines that are most needed for public health services and are listed on the List of Essential Medicines determined by the Minister of Health. 2. Drug Classification Various drug classifications: 1. According to their use, drugs can be divided into: a). to cure (therapeutic) b). to prevent (prophylactic) c). for diagnosis 2. According to how the drug is used, it can be divided: a).Medicamentum ad usum internum (internal use), is medicine that is used by people and is marked with a white label. b).Medicamentum ad usum externum (external use), is a medicine that is used other than orally and is marked with a blue label. Examples include implantation, injection, topical, mucosal membrane, rectal, vaginal, nasal, opthal, aurical, collutio/gargarism. 3. According to how they work, drugs can be divided into: a). Localis a drug that works on local tissue, like a drug used topically topical use. For example ointment, linimenta and cream b). Systemicis a drug that is distributed throughout the body. For example tablets, capsules, oral medication and others. 4. According to health law, drugs are classified into: a). Narcotic drugs (anesthesia) It is a drug that is needed in the fields of medicine and science and can also cause dependence which is very detrimental if used without restrictions and supervision b). Psychotropic Drugs (dangerous drugs) drugs that affect mental processes, stimulate or calm, change people's thoughts/feelings/behavior. c). Hard drugs are all drugs that: -has a maximum dose or is listed on the list of hard drugs. -marked with a special red round circle with a black border with the letter K touching the edge. -New drugs, unless declared by the Ministry of Health to be harmless -all parenteral preparations d). Limited Over-the-Counter Medicines are hard medicines that can be delivered without a doctor's prescription provided they are delivered in the original packaging and marked with a warning. e). Over-the-counter medicines are medicines that can be purchased freely, and are not harmful to the user and are marked with a green circle with a black outline.