Epsom salts - General Information:

A small colorless crystal used as an anticonvulsant, a cathartic, and an electrolyte replenisher in the treatment of pre-eclampsia and eclampsia. It causes direct inhibition of action potentials in myometrial muscle cells. Excitation and contraction are uncoupled, which decreases the frequency and force of contractions. (From AMA Drug Evaluations Annual, 1992, p1083)

Pharmacology:

Magnesium sulfate is a small colorless crystal used as an anticonvulsant, a cathartic, and an electrolyte replenisher in the treatment of pre-eclampsia and eclampsia. It causes direct inhibition of action potentials in myometrial muscle cells. Excitation and contraction are uncoupled, which decreases the frequency and force of contractions. Magnesium sulfate is gaining popularity as an initial treatment in the management of various dysrhythmias, particularly torsades de pointes, and dyrhythmias secondary to TCA overdose or digitalis toxicity.

Epsom salts for patients

Possible Adverse Effects

  1. ECG changes (prolongation of the atrio-ventricular conduction time, sinoatrial block and atrio-ventricular block).
  2. Circulatory collapse, hypotension.
  3. Gastro intestinal disturbances (diarrhoea, abdominal distension, absence of bowel sounds).
  4. Urinary retention.
  5. CNS depression (central sedation, muscle relaxation, hyporeflexia and decreased excitability).
  6. Calcium and potassium disturbances.
  7. Respiratory depression.

Special Considerations

  1. Anticipate change in calcium and phosphorus balance.
  2. Drug interaction has been reported between magnesium sulphate and gentamicin (respiratory arrest).
  3. Monitor serum magnesium and calcium levels.
  4. Antidote for hypermagnesaemia is calcium gluconate.

Epsom salts Interactions

Epsom salts Contraindications

Magnesium sulfate should not be administered parenterally in patients with heart block or myocardial damage.

Epsom salts more info

Indication, Mechanism Of Action, Drug Interactions, Food Interactions, etc..