Well, that goes to show I don't know what I'm talking about! My son has been on lithium for about 5 years but he's 25 and I don't know what his levels are!!
Lithium is the only med she is taking where her levels can be monitored. The others are given at the doctor's descretion.
I guess you need to impress upon the people giving the meds the need to monitor your mom more carefully.
You don't state her age, but I think when one hits a certain age, meds are metabolized less efficiently and the therapeutic dosage can vary due to circumstances.
Hope others will chime in with some good advice for you.
xxTsohl