Gabapentin, approved for seizures and postherpetic neuralgia, has become widely used off-label for ailments like fibromyalgia, neuropathy, and insomnia. Although helpful for some, its side effects and potential for interaction with other drugs raise concerns,…

Mary Peart, 67, a retired nurse in Manchester-by-the-Sea, Massachusetts, began taking gabapentin a year and a half ago to reduce the pain and fatigue of fibromyalgia. The drug helps her climb stairs,…