What medication is contraindicated in pregnant patients?

Ibuprofen is contraindicated in pregnant patients, particularly in the later stages of pregnancy. This is primarily due to its potential effects on fetal development and the risk of complications during labor. Ibuprofen belongs to a class of medications called nonsteroidal anti-inflammatory drugs (NSAIDs), which can lead to various issues such as causing premature closure of the ductus arteriosus (a vital cardiac structure in the fetus), increased risk of bleeding during delivery, and potential kidney problems in both the mother and the fetus.

In contrast, acetaminophen is generally considered safe for use during pregnancy when taken as directed for pain relief or fever management. While aspirin can also be used in certain situations under medical advice, it is used cautiously, especially in the third trimester due to similar risks associated with bleeding and potential effects on fetal health. The indication for acetaminophen and selective use of aspirin under supervision makes them different from ibuprofen in terms of safety during pregnancy. Thus, ibuprofen stands out as the medication with clear contraindications for pregnant patients.