A cocaine come down, like a cocaine crash, is associated with cocaine withdrawal. However, a crash occurs after you become chemically dependent on the drug, or use it repeatedly over a certain period of time. A comedown can occur after just one use. A drug comedown involves the drug’s effects as it begins to wear off.  Cocaine’s initial effects can be pleasurable, causing an intense feeling of euphoria, energy, empowerment, and alertness. However, as the pleasurable feelings start to wear off, you will still experience the stimulating effects of the drug, only they may cause insomnia, anxiety, paranoia, and panic. You might also feel jittery, restless, and uncomfortable. As the stimulant’s effects wear off, you may start to feel tired and drained of energy. After cocaine wears off, many people experience hypersomnia, which is sleeping for long hours.