November, 2006 by LEE COHEN, M.D. Over the last year, several studies on possible neonatal effects of prenatal exposure to SSRIs have been reviewed in this column. These studies have raised concerns about potential risks, [...]
In 2006, GlaxoSmithKline (GSK) elected to change product label warnings for the antidepressant paroxetine (Paxil), advising against the use of this drug by women who are pregnant. This decision was based on preliminary studies which suggested an increase in the risk of cardiovascular malformations among infants exposed to paroxetine in utero. A recent study from the Motherisk Program in Toronto has reported on the outcomes of over 3000 paroxetine-exposed infants.
As many of the traditional mood stabilizers used to treat bipolar disorder, including lithium and valproic acid, carry some teratogenic risk and the reproductive safety of other medications, including the atypical antipsychotic agents, has not been well-characterized, many women with bipolar disorder decide to discontinue their treatment during pregnancy. A new study from Dr. Adele Viguera and her colleagues at the Massachusetts General Hospital and the Emory University School of Medicine helps to better define the risks associated with discontinuing treatment during pregnancy.
A few weeks ago, January 7-13, 2008, was National Folic Acid Awareness Week at the Centers for Disease Control (CDC), therefore we wanted to take the opportunity to remind women of the importance of folic acid in the prevention of birth defects. Folic acid can prevent from 50-70% of neural tube defects, which are defects of the spine (spina bifida) or the skull (anencephaly). Spina bifida is the leading cause of childhood paralysis and anencephaly is nearly always fatal.
Early reports suggested that women with bipolar disorder may be at lower risk for onset or relapse of this disorder during pregnancy and that some women may be able to remain well during pregnancy despite medication discontinuation. However, more recent studies have suggested that recurrence of affective illness during pregnancy is relatively common among women with bipolar disorder. Dr. Adele Viguera and her colleagues at the Center for Women's Mental Health reported that among pregnant bipolar women, relapse rates were very high (58%) in those women who discontinued maintenance treatment with lithium during pregnancy (Viguera et al 2000).
Q. I have taken Paxil for about six years for depression and obsessive-compulsive disorder. I have tried several times to stop the medication but the symptoms come back within a few weeks of stopping the medication. My husband and I are now planning a pregnancy, and my obstetrician tells me that I cannot take Paxil during pregnancy. Are there any other options?
Although primarily used to treat schizophrenia and other psychotic disorders, the newer “atypical” antipsychotic agents are now used widely to treat a spectrum of psychiatric disorders, including major depression, bipolar disorder, PTSD and other anxiety disorders. While the reproductive safety of the older typical antipsychotic drugs, such as haloperidol (Haldol) and perphenazine (Trilafon), is supported by data accumulated over the past 40 years, we have far less data on the newer atypical agents: olanzapine (Zyprexa), risperidone (Risperdal), quetiapine (Seroquel), aripiprazole (Abilify), ziprasidone (Geodon), and clozapine (Clozaril).
Unfortunately the mood stabilizers most commonly used to treat bipolar disorder (including lithium and valproic acid) can increase the risk of certain types of congenital malformations in children exposed to these medications during the first trimester of pregnancy. For women who need a mood stabilizer during pregnancy, lithium is the safest option; however, when used during the first trimester, it carries a 0.1% risk of a cardiac malformation called Ebstein's anomaly. Although this is a potentially serious complication, it is important to keep in mind that the risk of malformation is relatively small.
Most women and their doctors try to avoid using medications during pregnancy. Of greatest concern is that a medication used during pregnancy may in some way harm the developing fetus or, at the very worst, cause a birth defect. But what happens when a pregnant woman needs to take a medication?
