Hi Thank you for your question. Prolapsed Lumbar Intervertebral Disc can be very painful at times. Next medication I would add for my patients after the ones you have described is gabapentin or pregabalin. This acts specifically for nerve related pain. A lumbar brace may help by decreasing painful movements. Next option if medicines are not helpful is selective nerve root block. This needs careful reviewing of the MRI image and is done by a spine surgeon/pain specialist under image guidance. Most of the patients will seek pain relief with this and the injections can be repeated if needed. Injections followed by physical therapy keep pain under control. Surgery(microdiscectomy) is a last option if all the previous ones cease to work. Hope this is helpful. I would be happy to answer any questions you may have.