What would an increase in drug tolerance most likely lead to?

An increase in drug tolerance occurs when a person's response to a drug diminishes over time, necessitating a higher dose to achieve the same effect that was previously obtained with a lower dose. This phenomenon is common with many substances, particularly those that depress or stimulate the central nervous system. As the body adapts to the presence of the drug, the initial dosage becomes less effective, prompting the individual to increase their intake.

This process is not limited to physical effects; psychological aspects are also involved. When a person becomes tolerant, they may perceive the need to consume more of the substance to experience the desired psychoactive effects, effectively leading to an escalation in dosage. Hence, seeking the same level of effects with reduced efficacy at previous doses results in increased consumption overall.