In psychology and substance use studies, when an individual like Dhruv reports needing to consume more alcohol to achieve the same 'high', it indicates a phenomenon referred to as Tolerance. Tolerance is a condition where the body becomes accustomed to a substance due to prolonged use, necessitating an increase in dosage to achieve the initial effects. This physiological adaptation is a hallmark of ongoing substance use and represents the body's diminishing response to the substance over time.
Considering the options:
Thus, the phenomenon Dhruv is experiencing is best explained by tolerance.
Tolerance is the phenomenon whereby an individual needs to consume larger amounts of a substance to achieve the same effect that was previously experienced with smaller amounts.
In Dhruv’s case, after years of alcohol consumption, his body has adapted to the presence of alcohol, requiring him to drink more to achieve the same "high" he initially felt with less alcohol. This is a classic example of tolerance, which can develop with prolonged use of substances such as alcohol, drugs, or medications. Over time, the body becomes less responsive to the substance, leading to increased consumption to feel the same effects.