Yes, too much cocaine can cause anxiety. Cocaine is a stimulant drug that affects the central nervous system and increases the levels of dopamine in the brain, leading to feelings of euphoria and increased energy. However, as the effects of the drug wear off, a person may experience anxiety, restlessness, and agitation. This can be compounded by the fact that cocaine use can disrupt sleep patterns and cause exhaustion, which can further exacerbate anxiety. Additionally, repeated use of cocaine can lead to changes in brain chemistry that can contribute to long-term anxiety and other mental health issues.