Which of the following medications is contraindicated for pregnant patients?

Clindamycin is an antibiotic used to treat various bacterial infections and is generally considered safe for use during pregnancy. It falls under category B, indicating that studies have not shown a risk to the fetus in humans, making it a preferable option for treating infections in pregnant patients.

Benzoyl peroxide, commonly used in acne treatments, is also considered safe during pregnancy. It is classified as category C, which means it should be used only if the potential benefits justify the potential risks. However, it lacks the severe contraindications associated with finasteride.

Erythromycin is an antibiotic that is often prescribed during pregnancy for bacterial infections. It is classified as category B, meaning it is safe for use and has not shown any adverse effects on the fetus in well-controlled studies, making it a commonly used medication in pregnant patients.