← EducationPregnancy

Prenatal Medication and Vaccine Safety

Medication decisions during pregnancy are a balance, not a blanket rule — some conditions are riskier left untreated than they are with an appropriate medication. This covers general categories and the specific vaccines recommended during pregnancy, but any individual medication (prescription, over-the-counter, or supplement) is worth a specific check rather than an assumption either way.

Last updated August 2026

Generally considered safe, in typical doses

Acetaminophen (Tylenol) for pain and fever, most antacids, and certain antihistamines are typically fine — but even here, "typically fine" means at recommended doses, not that more is better.

Generally avoided

NSAIDs (ibuprofen, naproxen, aspirin at pain-relief doses) are generally avoided, especially after 20 weeks, due to risks to fetal kidney function and blood flow — low-dose aspirin for preeclampsia prevention, when specifically prescribed, is a different situation from taking ibuprofen for a headache. Certain acne medications (isotretinoin in particular), some seizure medications, and a number of herbal supplements also fall into the avoid category, some of them absolutely rather than just generally.

Don't stop a chronic medication on your own

Medications for chronic conditions — depression, anxiety, seizures, high blood pressure, autoimmune conditions, thyroid disease — often need continued treatment during pregnancy, sometimes with an adjusted dose or a switch to a better-studied alternative, but stopping abruptly on your own can be riskier than staying on an imperfect option. This is a conversation to have with the prescribing provider, ideally before conceiving if it's planned, and as soon as possible if it isn't.

Vaccines recommended during pregnancy

Tdap is recommended during every pregnancy, ideally between 27-36 weeks, to pass protective antibodies against whooping cough to the baby before birth. Flu vaccine (inactivated, not the nasal spray) is recommended during flu season, any trimester. RSV vaccine is recommended between 32-36 weeks during RSV season to protect newborns in their first months, when RSV is most dangerous. COVID-19 vaccination is recommended and can be given at any point in pregnancy.

Live vaccines (MMR, varicella) are avoided during pregnancy specifically — if you need one, it's typically given before conceiving or after delivery instead.

Worth discussing with your provider

Every medication and supplement you're currently taking, prescription or not — bring the actual list

Whether your chronic condition medication needs adjusting for pregnancy, ideally before you stop or change anything

Your vaccine timeline for this pregnancy specifically, since some are time-window dependent

The First Trimester: What's Actually Normal →Preeclampsia and High Blood Pressure in Pregnancy →Low-Dose Aspirin in Pregnancy: Who It's For and Why →

Educational information only — general patterns that vary by person. This is not medical advice, a diagnosis, or a substitute for care from your own clinician.

More from Education

Contraception: Your Options, Explained Hormone Therapy for Menopause PMOS (formerly PCOS): Common Doesn't Mean Normal The Menstrual Cycle: Hormones, Ovulation, and What You Might Feel Abnormal Uterine Bleeding, Explained Endometriosis: When Period Pain Isn't Just Period Pain How Fertility Actually Works IVF: What the Process Actually Involves Semen Analysis: Where to Go, and What to Expect Vaginal & Menstrual Hygiene, Without the Myths Urinary Incontinence: The Basics Where This Information Comes From What Your OB/GYN Actually Offers OB/GYN Subspecialists — Who They Are and When You Need One Your Care Team Outside GYN — Who Else You Might Need How to Evaluate Health Information (Including Ours)Sexual Dysfunction: Causes, and the Role of Testosterone & Other Medications GLP-1 Medications: What Women Should Know Preventive Care & Screening, By the Numbers Understanding Your Pap Smear Results Talking to Your Teen About Her First Period What to Expect at Her First Gynecology Visit Miscarriage: What It Is, How Common It Is, and What Helps Postpartum Warning Signs: When to Seek Care Right Away Perimenopause: What's Actually Happening, and Why It's So Often Missed Menopause Is a Cardiovascular Turning Point — Here's Why Bone Health After Menopause: Osteoporosis Before the Fracture Pelvic Organ Prolapse: The Bulge Nobody Talks About Which Progestin Is Right for You?Nutrition and Your Cycle: The Basics Iron, Anemia & Heavy Periods Nutrition Across Your Reproductive Life Stages When Eating Rules or Body Image Take Over Vaginitis: More Than Just a Yeast Infection Hot Flashes Without Hormones: What Actually Works Emergency Contraception: Your Options and How Well They Actually Work Overactive Bladder: When It's Not About Leaking Pregnancy of Unknown Location: The Uncertain Early Days Hereditary Breast Cancer: When Family History Means Something More Chronic Bladder Pain Syndrome (Interstitial Cystitis)Non-Hormonal Birth Control Methods Breastfeeding: The Practical Basics The Fourth Trimester: What's Actually Normal After Birth STIs: Testing, Treatment, and What Actually Needs Follow-Up Uterine Fibroids: What They Are and When They Need Treatment HPV and Cervical Cancer Screening: The Vaccine, the Pap, and What Changed Ovarian Cysts: When They're Normal and When They're Not Breast Health Basics: Self-Awareness, Screening, and Benign Lumps Getting an IUD or Implant: What the Appointment Is Actually Like Vulvodynia: Chronic Vulvar Pain Without an Obvious Cause Vaginal Dryness and GSM: The Menopause Symptom Nobody Talks About Your Thyroid and Your Cycle: A Commonly Missed Connection Type 1 Diabetes, Your Cycle, and Pregnancy Planning Lupus, Your Cycle, and Pregnancy Planning PMDD: When PMS Is Actually Something More Genetic Carrier Screening Before Pregnancy Facing an Unplanned Pregnancy: Understanding Your Options Intimate Partner Violence: Why It's Part of Routine Care Reproductive Health for LGBTQ+ Patients Cycle Tracking and Fertility on Testosterone Fertility Preservation Before Gender-Affirming Care Chestfeeding: What to Know Cervical Screening for Trans and Nonbinary Patients The First Trimester: What's Actually Normal Nausea in Pregnancy: The Actual Management Ladder The Second Trimester: What's Actually Normal The Third Trimester: What's Actually Normal Low-Dose Aspirin in Pregnancy: Who It's For and Why Twin and Multiple Pregnancy: What's Actually Different Antenatal Monitoring: NSTs, Growth Scans, and Fetal Surveillance Fatigue in Pregnancy: Causes and What Actually Helps Prenatal Vitamins and Common Deficiencies in Pregnancy Preterm Labor: The Signs That Mean Call Now Gestational Diabetes: The Screening, and What a Diagnosis Actually Means Preeclampsia and High Blood Pressure in Pregnancy Prenatal Genetic Screening: NIPT, Nuchal Translucency, and the Quad Screen Clinical Depression: Recognizing It and What Actually Helps Anxiety Disorders: When Worry Becomes a Diagnosis Bipolar Disorder: Why It's Easy to Miss and Why the Distinction Matters PMDD, Depression, Anxiety, or Bipolar Disorder? How to Tell Them Apart