I too do not believe it would be a good idea to take a pill to forget.
Its a bad idea.
People need to live, and learn from there life experiences whether they are good or bad.
It isn't ethical to take such a pill, there would have to be some sort of criteria for someone to take this pill, and who would have the right, and make judgement on who can take it, and who cannot take it.
What if the person that raped this women wanted to take the same pills also to forget that he did this horrible crime to her?
I mean I know that there are some sick people out there that do not have a conscience, but hey if they can get there hands on this pill they can forget what they want with help of a little pill.
In that case how could any justice be served.
Just my two cents!