What is a common symptom of stimulant withdrawal?

A common symptom of stimulant withdrawal is profound depression. When individuals who have been using stimulants suddenly stop, they often experience a significant drop in mood. This occurs because stimulants increase the levels of certain neurotransmitters, like dopamine and norepinephrine, which create feelings of euphoria and increased energy while the drug is active in the system. However, after the cessation of the drug, there is a rebound effect where these neurotransmitter levels plummet, leading to feelings of sadness and a notable decrease in overall mood. This can manifest as profound depression, which is one of the hallmark symptoms of withdrawal from stimulant substances.

The other choices represent states that are typically associated with the active effects of stimulants rather than their withdrawal. Increased energy and heightened alertness are commonly experienced while stimulants are in use, and memory enhancement is not a recognized symptom of either withdrawal or the misuse of stimulants. Thus, the correct focus is on the profound depression that marks stimulant withdrawal.