What condition involves a user needing to increase dosage to achieve the same effect?

The condition described is characterized by the body's adaptation to a drug, where an individual must increase their dosage to achieve the same impact as previously experienced. This phenomenon is known as tolerance. Tolerance occurs because the body becomes accustomed to the substance and its effects diminish over time, prompting the user to consume more to feel the desired effect.

In the context of substance use, understanding tolerance is essential, as it can lead to an escalation of use and increase the risk of adverse health effects. It's important to note that while tolerance is related to physical changes in the body's response to a drug, it differs from addiction, psychological dependence, and physical dependence, which involve more complex interactions with behavior, cravings, and withdrawal symptoms.