Bryan Appleyard thinks not:
In my undrugged state of mind, I decided to do A. I then take a morally enhancing pill and decide, instead, to do B. The pill – and ultimately somebody like Dr Sandberg – has decided that B is morally superior to A. This has nothing to do with me and, therefore, nothing to do with my moral status, I am merely a pill popper, and everything to do with somebody else’s idea of what I should be.
The Dish 