Elle
Actually I didn't recommend the remedy for the sciatica symptoms but for the spinal stenosis. It followed that when the excess bone removed itself from inside the spinal column, the pressure was relieved on the nerves involved in sciatica.
If you've been diagnosed with spinal stenosis, you might want to try Heckla Lava 30C. I usually go with my intuition when it comes to dosage and how often. If you take Dr Falconer's course, you'll start to get the hang of it.