Which drug is a **CNS stimulant** that blocks dopamine reuptake?
AMorphine (opioid — depressant)
BCocaine (from *Erythroxylum coca*) — blocks dopamine reuptake → euphoria; highly addictive
CCannabis (mild euphoria via CB1, not via dopamine reuptake)
DDiazepam (sedative)
Answer & Solution
Correct answer: B. Cocaine (from *Erythroxylum coca*) — blocks dopamine reuptake → euphoria; highly addictive
Cocaine: blocks dopamine, norepinephrine, serotonin reuptake transporters; dopamine accumulates in synapse → strong reward signal → euphoria + addictive. From coca leaves (*Erythroxylum coca*). Different from opioids (μ-receptor agonists, depressants) and cannabinoids (CB1 receptors).
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