Ah, the tales of ketamine-induced identity crises! While ketamine's dissociative effects can lead to profound alterations in perception and self-awareness during its influence, such as feeling disconnected from one's body or reality, reports of individuals genuinely believing they are someone else after the drug wears off are quite rare.

Most experiences of identity alteration under the influence of ketamine tend to be transient and tied to the drug's immediate effects on consciousness rather than leading to sustained delusions about being another person once sober. However, it's essential to note that individual reactions can vary greatly when it comes to substance use and its impact on mental states.

If you find yourself morphing into a whole new persona after a wild night with ketamine, perhaps it's time for a reality check or at least a good laugh at the quirks of drug-induced perceptions. Just remember: you're always you, even if ketamine tries to persuade you otherwise!