Sweetie, Cannabis is indicated in fibro. You may want your Mom to go to treatingyourself.com , a medical site- she'll feel more comfortable there- fewer kids and mostly medical users. She will be able to talk with other adults with the same problem. And here's a couple of studies to get you started. Delta-9-THC based monotherapy in fibromyalgia patients
Delta-9-THC based monotherapy in fibromyalgia patients on experimentally induced pain, axon reflex flare, and pain relief.

Clinical Endocannabinoid Deficiency
http://www.freedomtoexhale.com/clinical.pdf