CVS Health has announced the sudden ousting of CEO Karen Lynch, who served for less than four years, amidst significant financial turmoil and a 19% drop in company shares this year. David Joyner, previously executive vice president and president of CVS Caremark, has been appointed as the new CEO, while Roger Farah transitions to executive chairman. The leadership change comes as CVS grapples with rising medical costs, slumping drugstore sales, and increased competition in the pharmacy sector, leading to the company's third financial outlook cut in 2024. Analysts suggest the change was necessary due to the company's underperformance in the market and operational challenges. Joyner's experience in healthcare and pharmacy benefit management will be crucial as CVS navigates this difficult landscape. The company is also considering a potential breakup to separate its Aetna insurance business from its retail pharmacy operations.