your mom can try.. Agonists, COMT Inhibitors, etc. Remind your mom, that almost all PD drugs have side-effects, but that they usually go away with in a couple of months, or you learn to live with them. Some she simply will not be able to tolerate, but most she will, and they will help her.
Patience is the key! It takes a while to arrive at a effective drug protocol.

Charlie