Monday's FDA decision means a new version of the pill once called Bendectin is set to return to U.S. pharmacies under a different name — Diclegis — as a safe and effective treatment for this pregnancy rite of passage.
In the intervening decades, the treatment is widely believed to have undergone more scrutiny for safety than any other drug used during pregnancy.
"There's been a lot of buzz about this. Nothing better has come along" to treat morning sickness in those 30 years, said Dr. Edward McCabe, medical director for the March of Dimes, who welcomed the step.
"We know safety-wise, there's zero question," said Dr. Gary Hankins of the University of Texas Medical Branch in Galveston, who headed one of the company-financed studies of Diclegis that led to its approval.
U.S. sales of Diclegis are expected to begin in early June, according to Canada-based manufacturer Duchesnay Inc. The company has long sold a generic version of the pill in Canada under yet another name, Diclectin.
For all the names, the main ingredients are the same: Vitamin B6 plus the over-the-counter antihistamine doxylamine, found in the sleep aid Unisom. U.S. obstetricians have long told nauseated pregnant women how to mix up the right dose themselves.
In fact, in 2004 the American College of Obstetricians and Gynecologists issued guidelines calling the combination a first-line therapy.
The difference that prescription-only Diclegis would offer: Combining both ingredients with a delayed-release coating designed to help women take a daily dose before their nausea sets in.
This news follows a Danish study last month that showed that Zofran, another morning sickness medication, is also safe.
Image: Woman suffering from nausea, via Shutterstock