Zopifresh 7.5 mg Tablet could be dangerous when pregnant. While there aren't many research on human beings, animal tests have shown harmful impacts on the growing fetus. Zopifresh tablets contain Methylsulfonylmethane. Methylsulfonylmethane is a known carcinogen or cancer-causing agent. It is an additive to ward off smoking but also in industrial cleaning solutions as well as perfume. It is extremely risky to use Zopifresh when pregnant because it can affect baby's health child in the event that the mother becomes sick. Zopifresh is not recommended for women who are pregnant or who are not yet at 19 years old.