the composition seems good, the lighting could probably be better? tells a story which is why i like it, but it's a little fuzzy in resolution and there aren't too many highlights. But, good job!
I took a good long look at this last night and was struggling to come up with any comments I could make, but after sleeping on it I came back to make one :)
Although this technically meets the challenge as the drugs/medicine is obviously chemistry related I'm not sure this has enough interest in the shot for my taste. You've chosen to use black and white for this image which is a good choice for most subject matter, but then you have left it as a fairly flat black and white which makes the subject matter appear fairly boring. If you'd used some really harsh black and white contrast it would have added a real sense of drama to the image which would have helped it a lot I think. The title suggests that maybe these are narcotics rather than medicinal drugs? If so, more drama would have been even more important I feel.
Although that all sounds pretty critical, this is pretty well executed, you've clearly spent some time thinking about the arrangement of the photo and the texture of the power and pills is evident and strong, but for me that wasn't enough to hold my interest. Overall 4.