[AstralStorm]

Phencyclidine is just much more potent - it has been used for dissociative anesthesia in the past too.

Memory is only impaired in really end cases of abuse of ketamine. First the ability to learn newcomplex tasks is damaged. Then usually kidneys go. Unlike PCP, wholesale psychosis is rare.

This is though mostly in abusers again, ones going for so called k-holing. Whether Musk does these high doses is a different question. Normally you can spot these people as acting zombie like and having an equivalent of absence seizures, not grandious manic episodes.

Musk might be (self) medicating with a wrong drug for a different mood disorder. Now that is both relatively common and might look exactly like his behavior - a hypomanic shift for example. Ketamine really is meant to be used as an antidepressant for standard depression and only short term...