Eat a well- balanced diet with plenty of fiber. Good sources of fiber are fruits, vegetables, legumes, and whole-grain bread and cereal (especially bran). Drink 1 1/2 to 2 quarts of water and other fluids a day (unless your doctor has you on a fluid-restricted diet). Fiber and water work together to keep you regular.
Zofran: FDA Pregnancy Category B. According to the United States Food and Drug Administration (FDA), ondansetron (Zofran) is a Pregnancy Category B drug. This means there is no evidence of risk in humans. Either animal findings show risk, but human findings do not; or, if no adequate human studies have been done, animal findings are negative.
Though Zofran was originally created in 1984 to treat nausea and vomiting in cancer patients after receiving chemotherapy, the drug is most commonly used today by pregnant women. It metabolizes in the liver and has a shelf-life of five to seven hours. Common side effects of the drug are headaches and sometimes constipation.