Pregnancy and breast-feeding: Bitter melon is
POSSIBLY UNSAFE when taken by mouth during pregnancy. Certain chemicals in bitter melon might start menstrual bleeding and have caused abortion in animals. Not enough is known about the safety of using bitter melon during breast-feeding. Stay on the safe side and avoid use.
Diabetes: Bitter melon can lower blood sugar levels. If you have diabetes and take medications to lower your blood sugar, adding bitter melon might make your blood sugar drop too low. Monitor your blood sugar carefully.