Constipation is a common problem during pregnancy for many reasons. Hormonal changes, structural changes occurring due to the enlarging uterus and the weight of the baby all can impact the digestive system, resulting in constipation. Epsom salt, also known as magnesium sulfate, is a mineral that can be mixed with water and taken as a laxative. Epsom salt is considered a saline laxative and should be used only under the direction of a midwife or doctor.
Procedure
Epsom salt laxatives are made by dissolving 2 to 4 tsp. of Epsom salt into 8 oz. of warm water, or as your health care provider or the package directs. Taking Epsom salt in this manner might produce a bowel movement in 30 to 60 minutes, though it does come with risks during pregnancy and you should not take Epsom salt laxatives without the direct instruction from your doctor or other health care professional.
Safety
According to Drugs.com, Epsom salts are rated by the FDA as pregnancy category A, meaning it has not been shown to cause fetal harm but the possibility that harm might occur has not been ruled out. Magnesium sulfate is excreted into the breast milk, though, so using Epsom salt laxatives prior to delivery might result in a transfer to the baby. Drugs.com doesn't indicate any adverse reactions from transfer through the breast milk, however.
Side Effects
Using Epsom salt laxatives during pregnancy might lead to dehydration from excessive fluid loss through the bowels. Dehydration during pregnancy can cause the uterus to contract and might lead to preterm labor. If your doctor recommends using Epsom salt laxatives, follow the prescribed dose and frequency carefully to prevent dehydration as much as possible. Replacing fluids by drinking water, decaffeinated teas and other beverages will help avoid dehydration as well. If you begin to experience more than two contractions per hour, contact your doctor or midwife immediately.
Contraindications
Individuals at risk for preterm labor should avoid saline laxatives, including Epsom salt laxatives. When the intestines are stimulated through laxatives and enemas, it is possible that uterine contractions can begin due to the close proximity of the uterus to the bowels. If you are at risk for preterm labor but are experiencing constipation, talk with your doctor about other alternatives, such as stool softeners and fiber supplements.
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