Certain medication effect ppl in differnet ways and since were talking about the pill i'll be specific to my reactions to it.
I went on the oral pill from a very young age, one of the side effects was weight gain, i put on a 1st 1/2 in about 1 yr. Then i tried the injection (depo provera) and put on more weight. I just seemed that these extra hormones that i was pumping into my body increased my weight (it even gives a nice warning on the packet). I came off the pill to have no1 child, i lost weight, then gained when i went back on the pill. Rinse and repeat for no2 child.
Sorry to bore you with that but some ppl just gain taking certain meds, it's life. I always gained 1.5 stone when starting the pill again, once i'd gained that magic number i'd flatline, then i could see about losing it!
Sorry can't answer your question about the green day thing, if anything they make me feel more bloated. I doubt its nothing to do with feeling fuller as potien takes longer to digest hence keeping you fuller for longer, maybe its something to do with sugar levels???
Just wanted you to know i feel your pain, I hate taking the pill but sometimes it's a neccessary evil! Glad you've lost and not gained, maybe you're negating the weight gain effects