whoa! those are too many drugs. looking for synergistic effects should stop at two meds. there may another cause for your trigeminal neuralgia (had scans looking at tissues and blood vessels?) you should speak with your doctor about reducing these, and if he/she's not receptive to this, i would get a second opinion. all those--strong--meds can adversely affect your long term health and i seldom see someone who does not benefit from 2 meds---->if the diagnosis is correct.