Eno is a popular antacid medication that is often used to help relieve heartburn during pregnancy. While it is generally considered safe for pregnant women to take, there are some potential risks and side effects that should be considered. Eno may increase the risk of developing constipation or diarrhea, so it is important to drink plenty of fluids while taking this medication. It is also important to avoid taking more than the recommended dose, as this could lead to potentially serious health complications. If you are experiencing frequent or severe heartburn during pregnancy, speak with your doctor about whether Eno or another antacid medication may be right for you.