My parents have never ONCE talked to me about sex, the dangers of having unprotected sex, etc.. Not once.
Nor have they spoken to me about smoking, doing drugs, drinking, etc.
I have never had the urge to do any of them, and the sex part will stay that way until i'm married. (And the rest will NEVER happen. )

This is MY choice, and my choice only. Just like having an abortion is someone's choice, and their choice only. We cannot lead people's lives, or atleast I don't think we should. .. no matter what we believe is right and wrong. (However, there is a line that should not be passed)
As far as not filling someone's perscription because of your beliefs.. that's ridiculous. Why get into that profession if you're going to deny your customers their requests?
It'd be like a vegan working at Outback and not allowing anyone to order a steak.
This is only my opinion of course.