The U.S. Food and Drug Administration (FDA) will seek to include its most serious warning, black box warning on 11 anti-seizure drugs cautioning about the risk of suicidal thoughts and behaviors.

The announcement comes days ahead of an FDA advisory panel meeting to discuss concerns about the drugs. According to documents posted on the agency's Web site Monday, a committee of outside medical experts will discuss suicidal behavior associated with epilepsy drugs at an FDA-sponsored meeting on Thursday

The Food and Drug Administration is very close to finalizing new suicide warnings for 11 anti-seizure medications after research showed they increased patients' risk of suicidal thoughts and behavior.

In addition to treating epilepsy, the anti-seizure medications are also used for a variety of other illnesses, including migraines, certain nerve-pain disorders, and psychiatric diseases such as bipolar disorder that themselves carry a risk of suicide

Pfizer Inc.won expanded federal approval Thursday to market the first pharmaceutical treatment for fibromyalgia, a mysterious condition marked by severe muscle pain and debilitating fatigue.

The medication, Lyrica, known generically as pregabalin, had previously gained FDA approval to treat, among other conditions as partial seizures and neuralgia