From The Black Books of Elverum, Mary S. Rustad edition:
To cure a fever (colla)
Write this on a piece of bread and give it to the patient for eight days, specifically a piece each day, and on the ninth day, burn the last piece, which is C x.
Colameris x, Colameri x, Colamer x, Colame x, Colam x, Cola c, Col x, Co x, C x
After doing this, the fever will be gone.
The grimoire The Black Books of Elverum lists this spell.