Fibromyalgia is a complex issue, and I would recommend your friend consider working closely with a practitioner that can work to determine the root cause. This article may be a good starting point for things to consider: https://www.rupahealth.com/post/fibromyalgia-causes-symptoms-treatments
Close friend has Fibromyalgia…can nutrition and/or other non-drug things help?
Fibromyalgia is a complex issue, and I would recommend your friend consider working closely with a practitioner that can work to determine the root cause. This article may be a good starting point for things to consider: https://www.rupahealth.com/post/fibromyalgia-causes-symptoms-treatments