This paper was overall a good paper. The opening paragraph did a great job of grabbing my attention and making me want to read the rest of the paper. The second paragraph was a good paragraph, but it seemed to have a few holes in it. I felt as if the paragraph was an assumption without facts. If you were to ad a few things the paragragh would be superb. Then the paper goes on to give the history of the usage of the drug, I was very intrigued and suprised when I read it. These paragraphs were put together very well. Your conclusion then does a nice job of wrapping the paper up.
This paper had minimal grammatical errors and was well written. Only the second paragraph left me with minimal questions. I would give this paper A