A drug is any chemical substance, other than a nutrient or essential dietary ingredient, that when administered to a living organism produces a biological effect. Drugs can change how the body and mind work, affecting physical or mental states
. Drugs are used for various purposes:
- Medicinal use: To treat, cure, prevent, or diagnose diseases or medical conditions. These are called pharmaceutical drugs or medications and include substances like aspirin or paracetamol
- Recreational use: To alter mood, perception, or consciousness for pleasure, such as alcohol, nicotine, or illicit drugs
Drugs can be administered in many ways, including ingestion, injection, inhalation, or absorption through the skin
. Drugs may have side effects and can cause addiction or dependence if misused. The correct dosage and duration of use are important to avoid harmful effects
. In summary, a drug is a chemical substance that influences biological functions, either for therapeutic purposes or other effects on the body and mind
