kylisa, Perhaps the dose is too strong? There are several on here that take this. I've asked both my neuro and my laryngologist (that pretty much oversees me locally) about it, and they've both said its not for me. Due to soft palate weakness mostly (I think) both think it might relax it too much, or make me more tired, or sleepier. Truly though, I don't understand why its an option for some and not for others.
Your description of your mom's reaction sounded more like it was an all over reaction, rather than a negative effect to problem area. That's why I wonder if maybe either a lower dose or less often....
good luck