I havent tried it but give her elli leaves obtain 6 kinds of it didnt work food both xl medicines every thing on your spice rack & oh iforget look in the recipies section of this site sry i cant help
Elli Grass is very valuable though, so it's pretty expensive... It'd be cheaper to give her hot milk or moon dumplings which costs only 100G. Compared to the cost of at least 2000G for the medicine in the grass..