Which antibiotic is commonly contraindicated during pregnancy due to its teratogenic effects?

• A. Amoxicillin
• B. Tetracycline
• C. Ciprofloxacin
• D. Penicillin

Answer: (B)

Tetracycline is commonly contraindicated during pregnancy due to its known teratogenic effects. This antibiotic can bind to calcium ions and affect bone development and enamel formation in the developing fetus, leading to issues such as discolored teeth and potential skeletal development problems. The risks associated with tetracycline are significant enough that it is generally avoided in pregnant individuals, especially during the second and third trimesters when fetal bone growth and mineralization are most active.

Other antibiotics, such as amoxicillin, ciprofloxacin, and penicillin, are generally considered safer options during pregnancy. Amoxicillin and penicillin are often prescribed if needed, as they do not carry the same risks of teratogenicity. Ciprofloxacin, while it may have some concerns related to cartilage and joints, is primarily avoided due to its classification as a fluoroquinolone, which is generally recommended against in pregnancy primarily due to its effects on developing tissues rather than direct teratogenicity. However, tetracycline's specific impact on fetal development makes it the standout choice for contraindication.