In pregnancy, which antibiotic recommendations are considered safer options for UTIs?

• A. Fluoroquinolones and tetracyclines are recommended in pregnancy.
• B. Nitrofurantoin or beta-lactams; avoid fluoroquinolones and tetracyclines.
• C. Macrolides only.
• D. Aminoglycosides.

Answer: (B)

When treating a urinary tract infection in pregnancy, the priority is to use antibiotics that reliably treat the infection while posing the least risk to the fetus. Nitrofurantoin and beta-lactams are favored because they achieve effective concentrations in the urine and have well-established safety data for use during pregnancy.

Fluoroquinolones and tetracyclines are avoided in pregnancy due to potential harm to the developing fetus—fluoroquinolones have concerns about cartilage development, and tetracyclines can affect teeth and bone growth. Aminoglycosides carry a risk of fetal ear and kidney toxicity, so they’re generally avoided for UTIs in pregnancy. Macrolides can be considered in certain scenarios, but they’re not typically the first-line choice for uncomplicated UTIs because of variable urinary concentrations and efficacy.

So the safest and most practical choice is nitrofurantoin or beta-lactams, with avoidance of fluoroquinolones and tetracyclines.