Which of the following is TRUE regarding stimulant drugs?

Stimulant drugs are known for their ability to increase alertness, attention, and energy levels, but they also carry the potential for significant psychological impacts. One of the key characteristics of many stimulant drugs—such as amphetamines and cocaine—is their ability to lead to dependence and addiction. This is due to their effects on the brain's reward pathways, which can create a cycle of increased use and cravings. Individuals may develop tolerance, requiring higher doses to achieve the same effects, and withdrawal symptoms can occur when use is reduced or stopped. This clinical understanding highlights the risk of using stimulants, particularly in contexts where they might be misused or abused.

In contrast, the other statements do not hold up to scrutiny. Stimulants are indeed associated with various mental health effects, including anxiety, increased heart rate, and potential for mood disorders, making option A incorrect. They also do not exclusively result in physical side effects; rather, their psychological effects can be substantial, which dismisses option C. Lastly, it is inappropriate to recommend stimulants for all patients, as their use is typically tailored to specific conditions like ADHD or narcolepsy and should be approached with caution; hence, option D is not accurate.