What is a common clinical manifestation of cannabis abuse?

The correct answer highlights that hallucinations are a common clinical manifestation of cannabis abuse. While cannabis is often associated with effects such as euphoria or relaxation, it can also lead to more severe psychological responses, especially at high doses or with prolonged use. Hallucinations, which can include auditory or visual distortions, may occur, particularly in individuals who are predisposed to mental health disorders or when cannabis is consumed in concentrated forms, such as edibles or oils.

The other options represent effects that do not align with the typical outcomes of cannabis use. For instance, increased testosterone levels are not typically associated with cannabis; studies suggest that chronic use may actually reduce testosterone in some individuals. Decreased heart rate is not a common manifestation; instead, cannabis often leads to an increased heart rate following consumption due to its stimulant effects on the cardiovascular system. Lastly, enhanced memory retention is contrary to what cannabis use usually produces; rather, it often impairs short-term memory and cognitive function, especially during intoxication. Understanding these implications contributes to a more comprehensive awareness of the potential risks associated with cannabis use.