The most popular theory is that valproic acid exerts its effects by increasing the concentration of gamma-aminobutyric acid (GABA) in the brain. GABA is a neurotransmitter, a chemical that nerves use to communicate with one another. The FDA approved valproic acid in February, 1978 and divalproex in March 1983. PRESCRIBED FOR: Valproic acid is used for the treatment of seizures, bipolar disorder, and prevention of migraines. Medically Reviewed by a Doctor on 9/15/2015. Report Problems to the Food and Drug Administration. You are encouraged to report negative side effects of prescription drugs to the FDA.
A nerve block is the injection of numbing medication (local anesthetic) near specific nerves to decrease your pain in a certain part of your body during and after surgery.
Nerve block. The nerve block is a physiological test that determines whether the patient's pain is mediated by the targeted nerve, i.e. one or more of the medial branches of the dorsal rami that innervate the posterior elements of the cervical spine including the intervertebral discs, the zygapophyseal joints, and the posterior neck muscles.