Conclusions: chronic pain studies of lidocaine patch 5% using the Neuropathic Pain Scale.

Many chronic pain patients have multiple etiologies for their pain, and accurate characterization of pain qualities and pain relief is essential for managing their pain. The ability to utilize a validated tool for assessing pain qualities and for identifying unique analgesic therapy effects on different pain qualities may assist clinicians in devising an appropriate treatment regimen. The Neuropathic Pain Scale (NPS) is a novel pain metric for characterizing pain in 10 dimensions. The ability to differentiate among pain qualities for each patient may result in a more refined and effective choice of therapy. The three research articles in this Supplement demonstrate the utility of the NPS in chronic pain patients treated with the lidocaine patch 5%, a peripherally acting medication that is not associated with systemic accumulation of the active drug. Significant reduction in the intensity of commonly reported pain qualities in patients with neuropathic and non-neuropathic chronic pain due to low-back pain, osteoarthritis, post-herpetic neuralgia, and painful diabetic neuropathy were achieved. The NPS offers clinicians a reliable means to accurately identify pain qualities associated with each individual patient and to target and assess the efficacy of various therapeutic options on those pain components. Utilizing the NPS, the lidocaine patch 5% was effective in treating chronic pain of both neuropathic and non-neuropathic origins suggesting that a given treatment's effect on various pain qualities may be consistent across pain types.