Complex sentence: The same group reviewed data for amitryptyline in the treatment of neuropathic pain and found limited useful randomized clinical trial data, but concluded that the long history of successful use in the community for the treatment of fibromyalgia and neuropathic pain justified its continued use.
Split into simpler sentences: The same group reviewed data for amitryptyline in the treatment of neuropathic pain and found limited useful randomized clinical trial data. They concluded that the long history of successful use in the community for the treatment of fibromyalgia and neuropathic pain justified its continued use.