Products
Epsom salt is available as an open product in pharmacies and drugstores. Specialty retailers can order it from specialized suppliers such as Hänseler. Epsom salt, as Epsom salt is also known, originated in Epsom, a suburb of London.
Structure and properties
Epsom salt is magnesium sulfate heptahydrate (MgSO4 – 7 H2O, Mr = 246.5 g/mol). It exists as a white crystalline powder or as shiny colorless crystals and is readily soluble in water. It dissolves even better in boiling water. The salt is odorless and has a salty-bitter taste. Epsom salt should be stored tightly closed, protected from light, heat and moisture.
Effects
Epsom salt (ATC A06AD04) has stool softening and laxative properties. It osmotically retains water in the intestine and promotes water secretion into the intestine, increasing the fluid content and volume of stool. The effects occur within about 6 hours.
Indications for use
For short-term treatment of constipation. In alternative medicine for “purification” and fasting.
Dosage
Adults take 10 to 15 g of the powder dissolved in sufficient water once daily (e.g., 15 g in 250 ml of water). The taste can be improved by adding a little lemon juice.
Contraindications
Epsom salt is contraindicated in hypersensitivity, intestinal obstruction, inflammatory bowel disease, abdominal pain of unknown origin, renal insufficiency, electrolyte imbalances, and hypermagnesemia. For complete precautions, see the Instructions for Use.
Interactions
Magnesium salts may interfere with the absorption of other drugs (e.g., tetracyclines, quinolones) and therefore should not be taken at the same time but at least two to four hours apart. Hypokalemia increases sensitivity to cardiac glycosides.
Adverse effects
Possible adverse effects include digestive symptoms such as diarrhea, nausea, and abdominal cramps. Electrolyte disturbances may occur with prolonged use. Abusive overdose can lead to dangerous magnesium poisoning.
