I personally had good results with homeopathy and my slipped lumbar disc. It did take quite some time to heal though. The intense pain at the beginning was relieved by Coffea (I did fit the mind picture perfectly). Then the complaint surfaced again 3 years later during early pregnancy which was threatened to miscarry. I took Viburnum 30 for quite some time once a week and stabilised the pregnancy and at the same time cured the back problems.
Although these may not be typical back/sciatica/disc remedies, they did help cure my case.
Claudia