Acetaminophen (Tylenol) is the safest over-the-counter option for managing flu-related fever and body aches during pregnancy, and the antiviral oseltamivir (Tamiflu) is the preferred prescription treatment. Beyond those two, a handful of other medications and non-drug remedies can safely help with specific symptoms like cough, congestion, and sore throat. Here’s what’s considered safe, what to avoid, and why treating the flu promptly matters more during pregnancy than at any other time.
Why the Flu Is Riskier During Pregnancy
Pregnancy naturally suppresses parts of your immune system to protect the developing baby, which makes you more vulnerable to severe flu complications. Influenza during pregnancy causes a 4% to 8% case fatality rate and five times more perinatal mortality compared to the general population. Previous studies have reported hospitalization rates as high as 92% among pregnant women with serious flu, with 75% developing pneumonia.
Even in milder cases, the risk of preterm birth is roughly doubled. One study found preterm delivery in 7.8% of pregnant women with influenza compared to 3.3% of healthy controls. These numbers explain why major medical organizations treat flu in pregnancy as an urgent issue rather than something to ride out at home.
Oseltamivir: The Preferred Prescription Antiviral
The CDC and the American College of Obstetricians and Gynecologists both recommend oseltamivir (sold as Tamiflu) as the go-to antiviral for pregnant women with suspected or confirmed flu. It’s taken by mouth, typically twice a day for five days. Oseltamivir works by blocking the enzyme the flu virus uses to spread from cell to cell, which shortens the illness and reduces the chance of dangerous complications like pneumonia.
Technically, oseltamivir is classified as “Pregnancy Category C,” meaning no controlled clinical trials have been done in pregnant women. But multiple observational studies involving thousands of pregnancies have consistently shown it does not increase the risk of birth defects, miscarriage, or other adverse pregnancy outcomes. That body of evidence is why it remains the preferred choice.
Timing matters. The recommendation is to start antiviral treatment as soon as possible after symptoms begin, ideally within 48 hours. Your provider should not wait for a confirmed flu test before prescribing it. ACOG guidelines call for empiric treatment, meaning starting the medication based on symptoms alone during flu season, because the window for effectiveness is narrow.
Acetaminophen for Fever and Body Aches
Acetaminophen remains the safest over-the-counter pain reliever and fever reducer available during pregnancy. Both aspirin and ibuprofen (Advil, Motrin) have well-documented adverse effects on the fetus, so they should be avoided.
That said, acetaminophen isn’t entirely without nuance. The FDA issued a notice to physicians noting that evidence has accumulated linking chronic acetaminophen use throughout pregnancy to a slightly increased risk of neurological conditions like autism and ADHD in children. A causal relationship hasn’t been established, and studies conflict on the question. The practical takeaway: use acetaminophen when you need it for a significant fever or real discomfort, but don’t take it around the clock for minor symptoms. Keeping a high fever down is important during pregnancy because sustained high temperatures in the first trimester have been linked to neural tube defects, so the benefit of treating a true fever typically outweighs the theoretical risk of short-term acetaminophen use.
Cough and Congestion Relief
For a persistent cough, dextromethorphan (the “DM” in products like Robitussin DM) is generally considered acceptable during pregnancy. It’s a cough suppressant found in many over-the-counter cold formulas.
Guaifenesin, the expectorant that thins mucus so you can cough it up more easily, is also not expected to significantly increase the chance of birth defects. A few studies have hinted at a small possible increase, but most available data suggest any risk is low. If you use a guaifenesin product while pregnant or breastfeeding, choose an alcohol-free formula.
The ingredient to watch out for is pseudoephedrine (Sudafed), an oral decongestant. ACOG does not recommend pseudoephedrine during the first trimester because of concerns about a possible link to certain birth defects. It can also raise blood pressure, which is already a concern during pregnancy. Phenylephrine, the other common oral decongestant, is similarly best avoided.
Safer Ways to Manage Congestion
Saline nasal spray is completely safe at any point in pregnancy and can be used as often as needed. It’s nothing more than salt water, and you can buy it at any drugstore. For more thorough relief, nasal irrigation with a neti pot works well. Fill it with a saline solution or water that has been distilled, sterilized, or previously boiled and cooled. Never use regular tap water, as it can carry organisms that are dangerous when introduced directly into your nasal passages.
A warm-mist humidifier in your bedroom, hot showers, and staying well hydrated also help loosen congestion without any medication at all. These approaches can be used alongside any safe medications you’re already taking.
Sore Throat Options
Plain throat lozenges and cough drops are considered safe during pregnancy. Peppermint candy, gum, or tea can also soothe a sore throat and have the added benefit of easing nausea, which the flu can worsen on top of existing morning sickness. Gargling with warm salt water several times a day is another simple, medication-free option that genuinely helps with throat pain.
Flu Vaccine: The Best Protection
The most effective way to avoid this whole situation is getting vaccinated. ACOG strongly recommends that anyone who is or will be pregnant during flu season receive an inactivated or recombinant flu vaccine as soon as it becomes available. Ideally, get vaccinated before the flu starts circulating in your community, but getting it at any point during flu season still provides meaningful protection.
One important distinction: the live-attenuated nasal spray vaccine (FluMist) is not approved for use during pregnancy. Only the injected versions are considered safe.
Vaccination during pregnancy doesn’t just protect you. Maternal antibodies cross the placenta and provide passive immunity to your newborn for up to six months after birth. Since babies under six months are too young to be vaccinated themselves, this transferred protection covers a particularly vulnerable window.
Quick Reference: Safe vs. Avoid
- Safe for fever and pain: Acetaminophen (use the lowest effective dose for the shortest time needed)
- Safe as a prescription antiviral: Oseltamivir (start within 48 hours of symptoms)
- Generally safe for cough: Dextromethorphan, guaifenesin (choose alcohol-free formulas)
- Safe for congestion: Saline nasal spray, neti pot with sterile water
- Safe for sore throat: Throat lozenges, peppermint tea, salt water gargle
- Avoid: Ibuprofen, aspirin, pseudoephedrine (especially first trimester), phenylephrine, nasal spray flu vaccine
When choosing any combination cold product (the ones labeled “multi-symptom”), check the active ingredients list carefully. These products often bundle several medications together, and some may include ingredients like pseudoephedrine or ibuprofen that you want to avoid. Single-ingredient products give you more control over exactly what you’re taking.