Which condition is a contraindication to lithium use?

• A. Pregnancy
• B. Seasonal allergies
• C. Asthma
• D. Chronic pain

Answer: (A)

Lithium is contraindicated in pregnancy because it can harm the developing fetus. It readily crosses the placenta and exposure in early pregnancy is linked to congenital heart defects, especially Ebstein’s anomaly, along with other fetal risks. Because of these dangers, lithium is generally avoided during pregnancy or used only with careful planning and alternatives when possible.

The other options do not by themselves rule out lithium use. Seasonal allergies, asthma, and chronic pain aren’t absolute contraindications; they may affect management in other ways (like monitoring or potential drug interactions), but they don’t carry the same proven fetal risk as pregnancy does with lithium.