At-Home Vagus Nerve Stimulation Promising for Postpartum Depression

With all the benefits on stroke recovery, does your doctor have enough functioning brain cells to prescribe this off-label? Don't listen to me, I'm not medically trained. Is your doctor? 

• vagus nerve (58 posts to July 2012)

At-Home Vagus Nerve Stimulation Promising for Postpartum Depression

At-home, noninvasive auricular vagus nerve stimulation (aVNS) therapy is well-tolerated and associated with a significant reduction in postpartum depressive and anxiety symptoms, new research suggests.

In a small proof-of-concept pilot study of 25 women with postpartum depression receiving 6 weeks of daily aVNS treatment, results showed that 74% achieved response and 61% achieved remission, as shown in reduced scores on the Hamilton Rating Scale for Depression (HAM-D17).

Dr Kristina M. Deligiannidis

Although invasive electrical stimulation of the vagus nerve was approved by the US Food and Drug Administration for treatment-resistant depression in 2005, it involves risk for implantation, infection, and significant side effects, coinvestigator Kristina M. Deligiannidis, MD, director, Women's Behavioral Health, Zucker Hillside Hospital, Northwell Health, Glen Oaks, New York, told Medscape Medical News.

"This newer approach, transcutaneous auricular VNS, is non-invasive, is well tolerated, and has shown initial efficacy in major depression in men and women," she said.

The findings were presented at the virtual American Society of Clinical Psychopharmacology (ASCP) 2022 Annual Meeting.

Potential Alternative to Meds

"Given that aVNS is a non-invasive treatment which can be administered at home, we wanted to test if this approach was safe, feasible, and could reduce depressive symptoms in women with postpartum depression, as many of these women have barriers to accessing current treatments," Deligiannidis said.

Auricular VNS uses surface skin electrodes to stimulate nerve endings of a branch of the vagus nerve, located on the surface of the outer ear. Those nerve endings travel to the brain where they have been shown to modulate brain communication in areas important for mood and anxiety regulation, she said.

Deligiannidis noted that evidence-based treatments for postpartum depression include psychotherapies and antidepressants. However, some women have difficulty accessing weekly psychotherapy, and, when antidepressants are indicated, many are reluctant to take them if they are breastfeeding because of concerns about the medications getting into their breast milk, she said.

Although most antidepressants are safe in lactation, many women postpone antidepressant treatment until they have finished breastfeeding, which can postpone their postpartum depression treatment, Deligiannidis added.

"At home treatments reduce many barriers women have to current treatments, and this intervention [of aVNS] does not impact breastfeeding, as it is not a medication approach," she said.

The researchers enrolled 25 women (mean age, 33.7 years) diagnosed with postpartum depression. Ten of the women (40%) were on a stable dose of antidepressant medication.