Shares of Tesla tumbled after The New York Times outlined some of the serious struggles CEO Elon Musk is experiencing. He and members of Tesla's board are set to meet with SEC officials as soon as next week, according to the report. The Times also reported the board is concerned about the CEO's use of Ambien to help him sleep, as well as recreational drugs, which sources tell the newspaper could be fueling his controversial tweets. » Subscribe to CNBC: http://cnb.cx/SubscribeCNBC About CNBC: From 'Wall Street' to 'Main Street' to award winning original documentaries and Reality TV series, CNBC has you covered. Experience special sneak peeks of your favorite shows, exclusive video and more. Connect with CNBC News Online Get the latest news: http://www.cnbc.com/ Find CNBC News on Facebook: http://cnb.cx/LikeCNBC Follow CNBC News on Twitter: http://cnb.cx/FollowCNBC Follow CNBC News on Google+: http://cnb.cx/PlusCNBC Follow CNBC News on Instagram: http://cnb.cx/InstagramCNBC Elon Musk's NY Times Interview: Experts Weigh In | CNBC