Musk revealed on the social media platform X on Wednesday that he is using Eli Lilly's Mounjaro for weight loss. Musk posted a photo of himself dressed as Santa Claus standing next to a Christmas tree on X, captioned 'Ozempic Santa Claus.' He later confirmed in several posts that he is indeed using a medication similar to Ozempic for weight loss. He explained, 'Strictly speaking, I'm using Mounjaro, but that name doesn't sound as fun.' Ozempic is a diabetes medication from Novo Nordisk, while Wegovy is the company's weight loss drug, both containing the same active ingredient, semaglutide. Mounjaro, on the other hand, is a diabetes medication launched by Eli Lilly, with the same active ingredient as the company's weight loss drug Zepbound, which is tirzepatide. Musk revealed that he initially tried using Ozempic for weight loss because taking high doses of the medication made him 'fart and burp like Barney from The Simpsons.' 'The side effects of Mounjaro seem to be less, and the results are better,' he added.