Please don't take anything in this thread personal but here it goes.
The guy looks like a cardboard cutout with a beveled edge. The pill bottle is enormous (compare it to his head.) The guy can almost fit in the drawer and the knob is half the size of his head. The blood that is on the drawer looks like it is floating. Something that thick with that much bevel and emboss on it would cast a shadow on the drawer.That is some THICK
blood. Almost like a thick paint. Also the guy would need two hands to hold that needle. It is huge.
Unless the guy is wearing a black body suit that covers his head too, he needs some color. Not just black. *Sorry but you asked*
Now on the good side, I love the mood, the lighting, the use of textures and muted colors to convey the feeling of a dirty, cold, grungy, sad world that this person is locked in.
Good job overall and the message was definately understood. Getting the point across is probably the hardest part of an illustration. Good job..