Elon Musk is reportedly worried about executives and board members at South African-led Tesla and SpaceX because he uses illegal drugs. The Wall Street Journalreferring to people from the billionaire’s entourage and close to his companies, international media reported.

Elon MuskPhoto: Kirsty Wigglesworth/AP/Profimedia

Musk often used LSD, cocaine, ecstasy and hallucinogenic mushrooms at private parties, the WSJ reported, citing witnesses. People close to Tesla Inc. and a SpaceX executive told the newspaper that Musk continues to use drugs, including ketamine. In August, Musk said he had a prescription for ketamine as a drug.

The billionaire’s lawyer told the newspaper that his client is “regularly and randomly tested for drugs at SpaceX and has never failed a test,” according to NDTV World.