In a video interview posted online on Monday with former CNN anchor Don Lemon, Elon Musk defended his use of ketamine, highlighting its potential benefits for investors. The billionaire Tesla CEO, responding to questions about his use of the dissociative drug, which is medically utilized as an anesthetic and in treating severe depression, conducted the interview earlier this month. However, this led to the cancellation of a deal for Lemon’s show on Musk’s streaming platform X.

Musk said he had a doctor’s prescription and that he takes only a tiny amount of the drug every other week to treat a negative chemical state similar to depression. He also brushed off concerns that his usage of the medication could interfere with his ability to run his businesses or work with governments and business partners.

In January, a Wall Street Journal article reported that some Tesla and SpaceX board members were concerned about Musk’s use of drugs like cocaine, ecstasy, and psychedelic mushrooms, which the company warned could put it in violation of government contracts and federal policies. Musk responded to the story by posting on X that he had agreed to three years of random drug tests for the National Aeronautics and Space Administration and that no traces of illegal substances had been found in his system.

But he also acknowledged that his use of the drug could potentially affect his productivity, saying if he uses too much ketamine, it can cause him to be unable to focus and that it makes 16-hour workdays normal for him. He said he had no plans to cut back on his work hours or use the drug more frequently but that if it does become necessary to do so, he will let the media know.

During the nearly hour-long discussion, Lemon also pressed Musk on his comments amplifying an antisemitic conspiracy theory and his apparent endorsement of an “abortion is murder” hashtag. He also asked whether Musk believes it’s his responsibility to moderate hate speech on X. The billionaire appeared visibly annoyed when asked if he had a moral obligation to take down some posts, and he seemed to imply that Lemon’s line of questioning was a “gotcha session” designed to embarrass him.

However, the interview also touched on politics, content moderation on X, and, of course, Tesla, which has struggled this year as investors question its demand for electric vehicles and the possible oversupply of production capacity. Musk, who runs the automaker and the rocket company SpaceX, said he doesn’t think Tesla is in oversupply but that the car and spaceship maker needs to produce more affordable vehicles to stay competitive with other companies. He also pushed back against criticism that he’s trying to create a new transportation model that’s too expensive for the average person.