4. What are the side effects of magnesium sulfate?
The line between a "therapeutic" and "toxic" dose of magnesium sulfate is very thin. In general, the larger the dose, the greater the chance of severe side effects. Doctors can test your blood to see how much magnesium is in it. This will indicate when a "safe" dose has been exceeded. They also can do reflex checks and monitor urine output, which also may indicate when a "safe" dose has been exceeded.
More common side effects
General muscle weakness
Complications (sometimes occurring with magnesium overdose)
Pulmonary edema (lungs fill with fluid; can be fatal)
Normal daily recommended intakes in milligrams (mg) for magnesium are generally defined as follows:
Persons U.S.(mg) Canada(mg)
Infants and children Birth to 3 years of age 40–80 20–50
4 to 6 years of age 120 65
7 to 10 years of age 170 100–135
Adolescent and adult males 270–400 130–250
Adolescent and adult females 280–300 135–210
Pregnant females 320 195–245
Breast-feeding females 340–355 245–265