The Whole Mars Catalog replied: “ nothing wrong with being a little horsey every once in a while .” Ketamine is often used as a veterinary anesthetic, especially for horses. Aside from ketamine, the report from the New York Times claimed Musk has been using Ecstasy, psychedelic mushrooms, and the prescription medication Adderall.

President Trump said he didn't know about Elon Musk's alleged drug use and backed the billionaire's cost-cutting.