The US Food and Drug Administration has advised physicians not to prescribe valproate or valproic acid drugs to women who suffer from severe migraines.

“Valproate medications should never be used in pregnant women for the prevention of migraine headaches because we have even more data now that show the risk for the children outweighs any treatment benefits for this use”, FDA Center for Drug Evaluation and Research’s Russell Katz said.
Source-Medindia