noxious potion

Have just ingested some noxious potion from a toothless old crone on a street corner. It tasted like slimy lemsip and was concocted from 5 various coloured bottles, some of which contained what I can best describe as slime. I feel it lurking in my stomach now waiting to strike. I might die. She pretended not to understand what my phrase book clearly indicated was "What is in this?", she just laughed and muttered "angleterre".