Q.Define addiction. Give the physiological effects of:

Addiction is a state of psychological and/or physiological dependence on a drug or substance, characterized by compulsive use despite harmful consequences, and the development of tolerance and withdrawal symptoms on s...

Addiction is compulsive drug dependence with tolerance/withdrawal; cocaine is a stimulant causing euphoria and cardiovascular strain, cannabinoids alter perception, mood and coordination.

Addiction refers to a compulsive, often uncontrollable pattern of drug or substance use, driven by both psychological craving and, frequently, physiological dependence, such that the user continues use despite awareness of its harmful physical, psychological or social consequences. Addiction is typically accompanied by the development of tolerance (needing progressively larger doses to achieve the same effect) and withdrawal symptoms (physical/psychological distress on stopping or reducing use).

(a) Cocaine is a powerful stimulant of the central nervous system, obtained from the coca plant, which acts by interfering with the reuptake of neurotransmitters such as dopamine at nerve synapses, prolonging their stimulatory effect. Physiologically, it produces intense euphoria, heightened alertness, energy and confidence, along with increased heart rate, blood pressure and body temperature; chronic use can cause severe cardiovascular strain (risk of heart attack/arrhythmia), paranoia, aggression, and strong physical and psychological dependence. …