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Requiring more and more drug to achieve effects once felt at lower doses is called:

ARelapse
BRemission
CTolerance
DWithdrawal
Answer & Solution
Correct answer: C. Tolerance
1. Repeated use changes how much drug is needed. 2. Tolerance is linked to physiological dependence. 3. It occurs when a person requires more and more drug to achieve effects previously experienced at lower doses. 4. Withdrawal instead appears when use stops. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 4 'States of Consciousness', sections 4.1-4.6_
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