Pilot Study of the Efficacy and Safety of Lidoderm Patch in the Treatment of Low Back Pain

Inclusion Criteria: 1. Were currently experiencing moderate/severe pain despite current analgesic treatment 2. Had daily moderate-to-severe LBP for at least 3 months duration 3. Had a mean daily pain intensity score of \>6 on a 0 to 10 scale, with 0 being no pain and 10 being pain as bad as the patients have ever imagined (Question 5 of BPI) during the baseline week; patients had to complete daily diary assessments at least 5 of 7 days during the baseline week Exclusion Criteria: 1. Had a history of greater than one back surgery, or one back surgery within 3 months of study entry 2. Had severe spinal stenosis 3. Had chronic back pain of \>12 months duration with an undefined spinal diagnosis 4. Had radicular symptoms with radiation into the thigh or below (i.e., knee, calf, foot, etc.) 5. Had received an epidural steroid/local anesthetic injection within 2 weeks prior to study entry 6. Had received trigger point injections within 2 weeks prior to study entry 7. Had received Botulinum Toxin Injections for LBP within 3 months prior to study entry 8. Were taking a lidocaine-containing product that could not be discontinued while receiving study medication 9. Were taking class 1 anti-arrhythmic drugs (e.g., mexiletine, tocainide) 10. Had received Lidoderm for LBP in the past