Tapchek

Hi, I've been trying to increase player speed by taking a potion im adding to the game. I created a speedmult magic effect but that didnt seem to work when put on the potion. my next though is i could make a script that runs the console command for speed multiplier but that seems uncecesarry. would anyone happen to know why doesn't the speed mult applied to the potion work in game or some other way to get PC only speed increase for a short time? thanks