Seattle, WAWhen Cindy was a teenager, she was diagnosed with epilepsy. Her neurologist prescribed Depakote. "I became pregnant and wasn't told to stop taking the medication," she says. "My first child was born with a heart malformation and my second child was recently diagnosed with fetal alcohol syndrome, but I didn't drink when I was pregnant."
Cindy (not her real name) says her daughter was diagnosed with fetal alcohol syndrome because "she has six of the 10 facial characteristics" that define the syndrome. Sonja, another mother who took Depakote while pregnant, was also told that her son had fetal alcohol syndrome—but Sonja doesn't drink at all. Could other doctors mistakenly diagnose Depakote birth defect cases for fetal alcohol syndrome?
There is a litany of adverse events possibly connected with Depakote.
Susan (not her real name) has an eight-month-old son with an underdeveloped right ear. "He has no ear canal and is deaf in that ear and one side of his face is larger than the other," she says. Her son has craniofacial microsomia, a congenital disorder that typically affects the development of the lower half of the face, including the ears. It can lead to breathing difficulties and is the second most common facial birth defect after clefts.
Two other mothers reported that their children were born with cleft palates. "I took Depakote for seizure disorder before and during pregnancy," says Denise. "My baby was born with a soft cleft palate. He needed soft cleft palate repair surgery in 2008 and currently has a delay in speech development."
Kimberly says: "I was being prescribed Depakote for epilepsy and when I became pregnant I was taking 1500mg a day. When I phoned my doctor's office to tell him I was pregnant, he instructed me to continue the drug. A few weeks later I had a miscarriage."
Since Depakote was approved in 1983, the FDA has received six cases of developmental delays, including two siblings reported to have autism. The agency reviewers said it "raises concerns" (6/26/09), but then added, "Further study is needed to further elucidate causality and degree of risk of fetal exposure to (Depakote) and subsequent developmental delay in children."
The drug carries a black box warning alerting users to potential birth defects. Yet a recent study found that "Sodium valproate exposure during pregnancy more than doubles the risk for a major congenital malformation (MCM) in the fetus compared with carbamazepine or lamotrigine," which are also anticonvulsants frequently prescribed for seizures (July 2010: the UK Epilepsy and Pregnancy Register and preliminary results from the European and International Registry of Antiepileptic Drugs in Pregnancy).
The FDA recently sent a letter to neurological and obstetric health workers warning that valproate sodium (marketed as Depacon), valproic acid (marketed as Depakene and Stavzor), divalproex sodium (marketed as Depakote, Depakote CP and Depakote ER) and related products have been shown to increase the risk of cardiovascular malformations, craniofacial defects, neural tube defects and other major birth defects when taken by pregnant women.
Because neural tube defects often develop before a woman even knows she is pregnant, the FDA issued a further warning in December 2009 to "women of childbearing potential." But what about all the women like Cindy who took Depakote before knowing they were pregnant? Those women who were never warned about Depakote and never given the option of taking carbamazepine or lamotrigine?
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