Drug interactions occur when the effects of one drug are altered by the presence of another drug, food, or substance. These interactions can lead to increased side effects, reduced effectiveness, or unexpected reactions. Understanding these interactions is crucial for safe medication management, especially for individuals taking multiple prescriptions. There are two main types of drug interactions: pharmacokinetic, which affects how the body absorbs, distributes, metabolizes, and excretes a drug, and pharmacodynamic, which involves the effects of drugs on the body. Awareness of potential interactions can help healthcare providers and patients make informed decisions about treatment options.