Which class of drugs is contraindicated in pregnancy due to the risk of fetal harm?

• A. Beta-blockers
• B. ACE inhibitors
• C. Antibiotics
• D. Antihistamines

Answer: (B)

The class of drugs that is contraindicated in pregnancy due to the risk of fetal harm is ACE inhibitors. These medications, which are typically used to manage hypertension and certain heart conditions, are known to cause significant adverse effects on the developing fetus. Specifically, ACE inhibitors can lead to teratogenic effects, which may result in malformations, reduced amniotic fluid, and can affect fetal kidney development, particularly in the second and third trimesters.

Previous research and clinical guidelines have indicated that exposure to ACE inhibitors during pregnancy is associated with various serious fetal risks, including renal dysgenesis, oligohydramnios, and skull hypoplasia, making it crucial to avoid these medications in pregnant patients.

The other drug classes mentioned are not generally associated with the same level of fetal risk. For instance, while beta-blockers can have some implications when used during pregnancy, they are not as severely contraindicated as ACE inhibitors. Antibiotics may be used with caution, depending on the type, as some are considered safe during pregnancy. Antihistamines, while they may have some considerations related to their use in pregnant women, generally do not carry the same level of risk. Therefore, ACE inhibitors are clearly identified as contraindicated in pregnancy due to