Elon Musk, the enigmatic CEO of Tesla Inc. and other ventures, recently stirred controversy with his remarks regarding his use of ketamine. In a candid interview, Musk defended his periodic use of the drug, stating that it helps alleviate periods of low mood and benefits investors in his companies. Musk revealed that he uses ketamine as prescribed to address what he describes as “chemical tides” that resemble symptoms of depression. While he...