| abstract |
The invention provides an indazole derivative of formula (1), or a pharmaceutically acceptable salt or N-oxide thereof, wherein R 1 , R 2 , R 3 and R 4 are as defined herein. The indazole derivatives are capable of blockading voltage dependent sodium channels and they are useful in the treatment or prevention of normal tension glaucoma, multiple sclerosis, a motorneurone disease, stroke, spinal cord injury, Alzheimer's disease, Parkinson's disease or pain. |