Multiple studies have demonstrated that the postpartum period is a time of increased vulnerability in women with bipolar disorder. Â However, because many of the commonly used mood stabilizers carry some teratogenic risk, many women elect [...]
There have long been concerns regarding the use of the anticonvulsant valproate (Depakote, VPA) during pregnancy. First trimester use of valproate has been associated with a 3-5% risk of neural tube defects, as well as an increased risk of other malformations affecting the heart and other organ systems. Multiple reports have also indicated that in utero exposure to valproate may also negatively affect cognitive development.
In studies of pregnant women with unipolar depression, it has been shown that untreated psychiatric illness in the mother may have a negative impact on pregnancy outcomes, influencing the length of gestation and birthweight. There is far less data on pregnancy outcomes in women with bipolar disorder. A recent Swedish study analyzes pregnancy outcomes in treated and untreated women with bipolar disorder and attempts to distinguish between the effects of medication versus the effects of untreated psychiatric illness in the mother.
While we have data on the use of lithium use during pregnancy with regard to risk for congenital malformations, there is much less information on the long-term effects of lithium on neurodevelopment. A recent study from the Perinatal Center of the Leiden University Medical Center provides some reassuring data on the long-term effects of lithium exposure.
Earlier this year we reported on a possible association between first trimester exposure to topiramate (Topamax) and increased risk of cleft lip and palate. In a recent study published by the American Journal of Obstetrics and Gynecology, researches drew upon data from two birth defect databases to further delineate the risks associated with topiramate exposure.
There have long been concerns regarding the use of the anticonvulsant valproate (Depakote) during pregnancy. First trimester use of valproate has been associated with a 3-5% risk of neural tube defects, as well as an increased risk of other malformations affecting the heart. In addition, recent reports have indicated that in utero exposure to valproate may also result in lower IQ.
While it is well-established that several of the older anticonvulsants, including valproate (Depakote), carry a significant teratogenic risk, less is known about the reproductive safety of the newer antiepileptic drugs (AEDs). The North American AED Pregnancy Registry was established in 1997 for pregnant women in the United States and Canada at the Massachusetts General Hospital. The purpose of the registry is to obtain and publish information on the frequency of major malformations among infants whose mothers have taken one or more AEDs during pregnancy.
Previous studies have indicated that infants exposed to valproic acid in pregnancy are at increased risk for a range of malformations, including neural tube defects. While these studies have shown an association between valproic acid and various malformations, they have been limited in their ability to quantify the risk of certain, less common malformations. To do this, large population-based case–control studies are more appropriate.
Anticonvulsants are not only used for the treatment of epilepsy but are now used with increasing frequency for the treatment of mood disorders, such as bipolar disorder. Recent studies have indicated that anticonvulsants may negatively affect bone mineral density, as well as increase fracture risk. This seems to be especially common with the older anticonvulsants (e.g., phenobarbital, carbamazepine, phenytoin, and valproate); however, the data regarding lamotrigine and other newer anticonvulsants is much more limited. While bone loss is more often seen with long-term use of these medications, several reports indicate that decreased bone density may also be detected within the first 1-5 years of use.
Bipolar disorder (types I and II) affect up to 5% of the population in the United States. As the onset of this condition typically occurs during or before the reproductive years, the management of bipolar disorder in women is often complicated by pregnancy. There are concerns regarding fetal exposure to medication, the impact of untreated maternal illness, and data demonstrating that women are at increased risk for relapse during the postpartum period.
