What is the number 1 most prescribed drug in US?

Can you enlighten me on the identity of the most commonly prescribed medication in the United States? I'm curious to know which drug tops the list in terms of frequency of prescriptions issued by physicians. It would be insightful to understand the medical reasons behind its popularity and the potential impact it has on public health. Additionally, I'm also interested in knowing if there are any ongoing debates or concerns surrounding the widespread use of this particular drug.