I want to know the answer to the following question:
What is the most used antihypertensive drug today?
All the background I'm provided with is that "In the mid-1950s Karl H. Beyer, James M. Sprague, John E. Baer, and Frederick C. Novello of Merck and Co. discovered and developed chlorothiazide, which remains the most widely used antihypertensive drug today.". Is that enough to answer the question?