Which class of medications is NOT advised for pregnant women due to potential side effects?

Antihistamines are often used to treat allergic reactions and symptoms, and while some antihistamines are generally considered safe for use during pregnancy, this varies by specific medication and timing in the pregnancy. Many antihistamines are categorized as Class B or C, which means they may not have clear evidence of safety or they may pose risks that need to be weighed against benefits. While pregnant women should always consult with their healthcare providers about the use of any medication, it is not that antihistamines are categorically advised against for all pregnant women.

In contrast, some antidepressants, NSAIDs, and certain antibiotics may have more defined risks associated with their use during pregnancy, particularly in the first trimester or close to delivery. For instance, NSAIDs can lead to complications such as reduced fetal blood flow or potential kidney issues in the developing fetus. Therefore, while caution is advised with antihistamines, they are not the primary class of medications generally identified as not advisable for pregnant women due to potential side effects.