Because people with fibromyalgia often have trouble sleeping, they sometimes turn to supplements that have a reputation for helping people sleep. Among these, melatonin has drawn perhaps the most attention; preliminary results found it not only improves sleep patterns, it actually might help fibromyalgia pain.
Other sleep-aid supplements include lavender, chamomile, valerian, hops, and skullcap. However, research is mixed on their effectiveness for insomnia, and there's no evidence that any work for fibromyalgia.
Always consult your doctor before starting a dietary supplement. Some supplements may interact with medications.