Which factor is not important for determining the drug user's "high," according to imaging studies?

Question

Quizplus · Accepted Answer

Imaging studies have shown that factors such as the number of dopamine transporters occupied by the drug, the route of administration of the drug, and the baseline level of dopamine in the mesolimbic pathway are all important for determining the drug user's "high." However, the age of the user is not considered as an important factor in determining the drug user's "high" in imaging studies.

Which Factor Is Not Important for Determining the Drug User's