All I can say is assume all heavy questions in pivotal episodes like this will be answered in the future - even if it's a season or three away.It was buffy's reaction to losing her strength, that if she hadn't become a slayer her life might have been meaningless. Also, she was drugged to take those powers away. I was just wondering if she had that strength all the time or if she was given that strength after she was chosen.
As for the serum Giles gave her, I don't think it's meant to be seen as 'drugs' in the literal sense. I think a magical element is implied. I mean, you make drugs from ground-up herbs and plants and they make potions from ground-up herbs and plants.
And the show does create a parallel between magic and chemistry. Notice how Willow and Giles are usually working their mojo in the chem lab. But there's a pretty heavy symbolic element to this as well. There is a direct correlation between Willow's developmental growth and her chemistry - or the bonds she forms - with others. Think back to the Angel soul spell. You could argue that she was closer to Jenny than even Giles was. And the core power of that spell came from her invoking upon the bond she had with her mentor.
I wasn't sure if I should mention this or not. But we are having this discussion about "choice."That's what I like about the relationship, and what made this this episode kind of uncomfortable. To see Giles administer the injection was almost like a betrayal in a way, but he was forced by the higher ups to do it. This episode actually added (Or further developed) an element to the series I'm actually excited for. We're starting to go beyond Sunnydale and that's exciting.
Well, there's a pretty popular interpretation of this episode that suggests it's a metaphor of the abortion debate. It's ultimately about two old white men squabbling over Buffy's agency over her own body.