Final answer:
In the third trimester of pregnancy, NSAIDs and ACE inhibitors are two categories of medications that should be avoided due to risks of fetal heart issues, reduced amniotic fluid, and potential kidney damage.
Step-by-step explanation:
Pregnant women in their third trimester should avoid certain medications due to potential risks to the fetus. NSAIDs (Nonsteroidal anti-inflammatory drugs) such as ibuprofen can cause problems with fetal heart development and increase the risk of premature closure of the ductus arteriosus, which is vital for fetal circulation. Additionally, NSAIDs can reduce amniotic fluid levels, leading to compromised fetal health. Another medication to avoid is ACE inhibitors, which are used for treating hypertension. These drugs can cause major developmental defects in the fetus's developing kidneys, potentially leading to renal dysfunction or fetal growth restrictions.
It's crucial for expectant mothers to consult with their healthcare providers before taking any medications, including over-the-counter drugs. Healthcare providers can help identify safe alternatives during pregnancy to manage health conditions without harming the developing baby.