Meadowsweet is not considered safe during pregnancy. The European Medicines Agency explicitly recommends avoiding it, and the U.S. FDA classifies it as an herb of undefined safety. The concern centers on two issues: meadowsweet contains natural salicylates (compounds related to aspirin), and it has shown the ability to stimulate uterine activity in laboratory settings.
Why Meadowsweet Raises Concern
Meadowsweet naturally produces salicylates, the same family of compounds that gives aspirin its pain-relieving and anti-inflammatory effects. In fact, meadowsweet was one of the original plants that inspired the development of aspirin in the 19th century. While the salicylate content in a cup of meadowsweet tea is lower than a standard aspirin tablet, the presence of these compounds is enough to trigger the same category of warnings that apply to aspirin use during pregnancy.
Salicylates work by blocking the production of prostaglandins, which are hormone-like substances involved in inflammation, pain signaling, and several critical functions during pregnancy. Prostaglandins help regulate blood flow through the fetal heart, maintain the opening of a key blood vessel called the ductus arteriosus that the baby depends on before birth, and play a role in uterine function. Disrupting prostaglandin activity at the wrong time can interfere with all of these processes.
Risks to the Baby
The most studied risk of salicylate exposure during pregnancy involves the ductus arteriosus, a blood vessel that allows blood to bypass the baby’s lungs in the womb. This vessel is supposed to stay open until birth, then close naturally once the baby starts breathing air. Salicylates can cause this vessel to narrow prematurely. Animal research has shown that salicylate exposure significantly increased resistance across the ductus arteriosus (from about 4 to 27 resistance units) and raised pressure in the fetal pulmonary artery. Premature narrowing of this vessel can strain the baby’s heart and lungs before they’re ready to function independently.
These effects have been most clearly documented with direct aspirin exposure at higher doses, and it’s uncertain exactly how much meadowsweet tea or supplement use would be needed to produce the same effect. But the underlying mechanism is the same, and no studies have established a safe threshold for meadowsweet specifically during pregnancy.
Uterine Stimulation and Miscarriage Risk
Beyond the salicylate issue, meadowsweet has demonstrated uterine-stimulating activity in laboratory tests. This means it may cause the uterus to contract, which raises a potential risk of miscarriage, particularly in early pregnancy. This uteroactivity has been documented as a reason to avoid meadowsweet during both pregnancy and breastfeeding. While lab findings don’t always translate directly to real-world effects from drinking tea, the combination of uterine stimulation and salicylate content makes meadowsweet a higher-risk herb compared to many other botanicals.
Breastfeeding Carries Similar Warnings
The same lack of safety data applies after delivery. Meadowsweet has not been sufficiently studied to determine whether its active compounds transfer into breast milk or what effect they might have on a nursing infant. Both the European Medicines Agency and major drug reference databases recommend avoiding meadowsweet while breastfeeding. People with salicylate sensitivity or asthma should also avoid it regardless of pregnancy status.
Safer Options for Common Symptoms
Most people reach for meadowsweet to manage heartburn, indigestion, or mild pain, all of which are common during pregnancy. For heartburn, simpler approaches carry far less risk. Eating yogurt, drinking milk, or stirring a tablespoon of honey into warm milk can provide quick relief. Chewing gum after meals helps neutralize stomach acid. Over-the-counter antacids are generally considered safe during pregnancy, though it’s worth confirming with your provider which specific product to use.
For pain relief, acetaminophen remains the most widely recommended option during pregnancy. If you’re drawn to herbal remedies for digestive comfort, ginger has a much stronger safety profile during pregnancy and is commonly used for nausea. Your provider can also prescribe medications specifically vetted for use during pregnancy if simple remedies aren’t enough.