Professor of Psychiatry Associate Dean for Faculty Yale School of Medicine New Haven, CT
That's a complex question that only you and your doctor can decide. I can, however, tell you what we know about depression during pregnancy, and about women who have been diagnosed with depression before becoming pregnant. One study of 201 women with major depressive disorder found that 68 percent of those who stopped taking their medication when they got pregnant relapsed, compared to just 26 percent of those who continued their medication.
Depression during pregnancy is a serious issue. It has been linked with preterm delivery, low birthweight babies, preeclampsia, postpartum depression and even miscarriage. Plus, women who are depressed during pregnancy are less likely to see their health care providers often enough and may not gain enough weight. They are also more likely to smoke, drink alcohol or use cocaine. And, just as with women who aren't pregnant but who are depressed, they are likely to become withdrawn and may attempt suicide.
Decades of use of antidepressants during pregnancy has provided us with some fairly good information on the safety of some medications during this time. However, this information is retrospective. It looks back at women's experiences, rather than prospectively and randomly assigning women to different groups to test the effects of these drugs. Nonetheless, here's what we know:
- Selective serotonin reuptake inhibitors (SSRI). This class of drugs includes fluoxetine (Prozac) and paroxetine (Paxil). Most are considered generally safe with the exception of paroxetine, which may increase the risk of certain birth defects in the infants of women who take the drug during the first trimester. There is also some evidence that babies born to women who took SSRIs throughout pregnancy were more likely to be born early. We have the most evidence on the safety of fluoxetine during pregnancy.
- Venlafaxine (Effexor). Only one study has been published so far on the use of venlafaxine during pregnancy, and it showed no increased risk in birth defects.
- Mirtazapine (Remeron). Again, just one trial has been published about the effects of mirtazapine during pregnancy; it showed a higher rate of miscarriage and preterm births in women taking the drug than in those not taking it.
- Bupropion (Wellbutrin). In the one published study of bupropion use during pregnancy, women taking it during the first trimester for either depression or to help them quit smoking were compared with women taking other antidepressants or women not using any antidepressants. There was no major difference in birth defects, although there was a significant difference in the number of miscarriages in the bupropion group.
- Tricyclic antidepressants. This class of drugs includes nortriptyline and desipramine. Long-term data show little association between these medications and any birth defects, although there are some reports of withdrawal symptoms in infants.
There are nonpharmacological options for treating depression in pregnancy, including psychotherapy and bright-light therapy.
You and your health care providers need to carefully consider the pros and cons of continuing on your medication as you become pregnant, keeping in mind the impact of your overall health on your baby, as well as any effects of medication.