Final answer:
Drug abuse is the misuse of a drug without medical guidance for unintended purposes, which can lead to addiction and dependence, characterized by the compulsive use of the drug and withdrawal symptoms upon cessation.
Step-by-step explanation:
Drug Abuse Definition
Drug abuse is the use of a drug without the advice of a medical professional and for reasons not originally intended. It often involves the compulsive use of psychoactive substances, leading to negative consequences despite the harm it may cause. Drug addiction, which may develop from persistent drug abuse, refers to the inability to stop using the substance regardless of the negative impact on one's life. This can lead to a condition known as drug dependence, where the body or mind experiences withdrawal symptoms upon cessation of the drug.
Factors of Drug Abuse and Addiction
Psychoactive drugs can affect mood and cognition, providing desirable effects like euphoria or increased alertness. These drugs may serve as agonists or antagonists to various neurotransmitter systems in the brain. Continuous use can result in tolerance, needing greater amounts of the drug to achieve the initial effect, potentially leading to an overdose. The harmful cycle of drug abuse might require professional intervention for rehabilitation.