Medications to Avoid During Pregnancy: OTC and Prescription Safety
Which medications are commonly avoided in pregnancy, why they matter, safer alternatives to discuss with your provider, and how to check your full medication list.
Pregnancy & medication disclaimer
Medication safety in pregnancy is highly individual. Do not start or stop any drug based on this article alone. Contact your obstetrician, midwife, or pharmacist before taking any prescription, over-the-counter medicine, or supplement during pregnancy or while trying to conceive. In an emergency, call 911 or your local emergency number.
Quick answer
Many OTC and prescription drugs need review in pregnancy. Commonly avoided categories include NSAIDs (like ibuprofen) in later pregnancy, isotretinoin (Accutane), certain ACE inhibitors, warfarin, and high-dose vitamin A. Never stop prescribed meds without medical guidance. Bring a complete medication list — including supplements — to your first prenatal visit.
Why pregnancy changes medication decisions
Drugs can cross the placenta and affect fetal development, especially in the first trimester when organs form. Other medications are safer later in pregnancy but risky earlier — or the opposite. The safest approach is a medication review with your prenatal provider as soon as you know you are pregnant (or while trying to conceive).
Commonly avoided or restricted medications
General categories — your clinician will weigh risks vs. benefits for your situation.
Pain and fever
- NSAIDs (ibuprofen, naproxen, aspirin at high doses) — often avoided, especially in the third trimester
- Acetaminophen — frequently used when approved by provider; use lowest effective dose for shortest time
Skin and acne
- Isotretinoin (Accutane) — must be avoided; causes severe birth defects
- High-strength retinoid creams — discuss with dermatologist; some are contraindicated
Blood pressure and heart
- ACE inhibitors and ARBs — avoided in pregnancy
- Warfarin — generally avoided; requires specialist management if needed
Mood and mental health
- Some psychiatric medications need dose adjustment or switching — do not stop abruptly
- Untreated depression/anxiety also carries pregnancy risks; balance matters
Antibiotics and infections
- Untreated infections can harm pregnancy — many antibiotics are safe; others (e.g. tetracyclines) are avoided
- Always complete prescribed treatment after provider confirms safety
Supplements and herbs
- High-dose vitamin A — avoid unless prescribed
- Herbal products (e.g. black cohosh, dong quai, weight-loss blends) — often unstudied in pregnancy; assume caution
- Prenatal vitamins — usually recommended; choose one with folic acid per provider guidance
Do not stop prescriptions on your own
Seizure medications, blood thinners, thyroid drugs, insulin, and psychiatric medications may need to be continued or switched — not stopped suddenly. Call the prescribing doctor the same day you get a positive pregnancy test.
How to prepare for your medication review
- Write down every prescription, OTC product, vitamin, and supplement with doses
- Note when you last took each item
- Run your list through our drug interaction checker and bring results to your appointment
- Ask about safer alternatives for anything you take regularly
- Use one pharmacy so records stay consolidated
Trying to conceive? Start early
Ideally, review medications before pregnancy. Folic acid supplementation is commonly recommended in advance. Track timing with our ovulation calculator and estimate milestones with the due date calculator once pregnant — tools are educational only.
When to call your provider urgently
- You took a medication known to be high-risk in pregnancy and just found out you are pregnant
- Vaginal bleeding, severe cramping, or decreased fetal movement (later pregnancy)
- Fever, dehydration, or illness where you need medication guidance
Screen your medication list
Check prescriptions, OTC drugs, and supplements for known interactions.
Open Drug Interaction CheckerPregnancy & medication disclaimer
Medication safety in pregnancy is highly individual. Do not start or stop any drug based on this article alone. Contact your obstetrician, midwife, or pharmacist before taking any prescription, over-the-counter medicine, or supplement during pregnancy or while trying to conceive. In an emergency, call 911 or your local emergency number.