|Toxic side effects of the drugs used to control pain can damage the liver; liver function needs close monitoring. Bone marrow and blood disorders are also associated with anticonvulsant therapy and may include agranulocytosis, aplastic anemia, or suppression of the white blood cell count; therapy can continue, but close monitoring with complete blood counts is required.|
Surgical procedures can cause numbness of the face or eye that may in itself be unpleasant (anesthesia dolorosa) and may lead to complications such as corneal abrasion. Serious complications leading to death are rare, but in individuals with surgical microvascular decompression may include hemorrhage, infection, and brainstem damage around the area of the procedure (Burchiel).
There may be residual facial numbness, jaw weakness, or corneal numbness following radiofrequency trigeminal gangliolysis. Hearing disturbances occur in 11% of individuals following percutaneous balloon microcompression (Burchiel).
Source: Medical Disability Advisor