Pharmaceutical preparations and substances for the treatment of epilepsy, convulsions, seizures, pain, multiple sclerosis, neuropathic pain, spinal cord injury, bladder disfunction, peripheral neuropathy, cancer pain, peri-operative pain, rheumatoid arthritis, inflammatory bowel disease, ulcerative colitis, neurogenic symptoms, psychotic disorders, diseases of the central nervous system, stroke and head injury, motion sickness and chemically induced sickness, spasticity, oncology, cancer symp...