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Disclaimer: This guide is for education only and is not a substitute for professional medical advice. Always confirm medicine, supplement and product decisions with your obstetrician, midwife, pharmacist or healthcare provider.

Medication

Is Macrobid (Nitrofurantoin) Safe During Pregnancy?

Published 2026-07-08 | By SafeMama Editorial Team | Editorial policy

Is Macrobid (Nitrofurantoin) Safe During Pregnancy? pregnancy safety guide image

Short answer

Nitrofurantoin is commonly used for urinary tract infections in pregnancy when prescribed, but the right antibiotic depends on urine culture results, trimester, allergies, and conditions such as G6PD deficiency.

Often used when prescribed for a UTI

What is the safest way to think about this?

ACOG urinary tract infection guidance discusses nitrofurantoin as an option in pregnancy, while MotherToBaby explains nitrofurantoin exposure data. The answer is still not DIY because untreated UTIs and the wrong antibiotic can both create problems.

What is generally okay?

  • Use only when prescribed for your current infection.
  • Ask whether a urine culture or follow-up test is needed.
  • Tell your clinician about G6PD deficiency, kidney disease, allergies, or late-pregnancy timing.

What should you avoid or double-check?

  • Avoid using leftover Macrobid for burning or urgency.
  • Avoid stopping early unless your clinician tells you to.
  • Avoid ignoring fever, back pain, chills, contractions, or worsening symptoms.

How SafeMama helps

SafeMama can identify nitrofurantoin or Macrobid on a prescription label and prompt the right questions to ask your clinician or pharmacist.

Open the SafeMama app, scan the barcode or search the ingredient, then use the result as a starting point for a conversation with your healthcare provider.

Sources

Frequently asked questions

Can I take Macrobid in the first trimester?

Some clinicians may use it when appropriate, especially if alternatives are not suitable. Ask your pregnancy clinician before starting or continuing it.

What if my UTI symptoms are getting worse?

Call promptly, especially with fever, flank or back pain, vomiting, contractions, or feeling very unwell.

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