Quick question re: Lupin's resignation

[Liz S.]

No: HPFGUIDX 107556

tookishgirl_111 at yahoo.com writes:
I've also been wary of Lupin's comment of "As long as I take it in 
the week preceeding the full moon...".  If this is true then why 
didn't Snape give it to him earlier? 
==============
Sherrie here:

See, I've always read that as indicating that he had to take it the 
WHOLE 
week before the full moon - as in nightly/daily doses, NOT just once 
sometime 
during that week.  But maybe that's just me...

Now me, Liz (who lurks a lot but doesn't post much!):

I agree with Sherrie, that the potion had to be taken the full week before the full moon, almost like that much needs to be in his system constantly that week leading up, and then the accumulative amount during the full moon. Because if he only had to take it once during that week leading up to the full moon, he could just ignore the lunar calendar and take it once each week as a precaution. I think it's just like the birth control pill, you've gotta do it on a schdeule or it doesn't work right. So he forgot it that night, and that's when he was out in the full moon, it wasn't safe, and that's why he transformed.