@askkatzeff That sounds pretty likely to me. The reason I ask is also that I don't have that much experience with ketamine (and none taking it). It's an anxiolytic though, i.e. it reduces anxiety. Anxiety is extremely common in depression, so it supports your thought. It raises other questions: What is Musk anxious about? We might never know. And is the ketamine paradoxically provoking him to be even more anxious? (Strong anxiolytic drugs like benzos have that withdrawal effect).