- Torsades de Pointes, especially in the setting of tricyclic antidepressant overdose not resolved by sodium bicarbonate and Amiodarone.
- Digitalis induced ventricular arrhythmias.
- As an anticonvulsant in eclampsia.
- Suspected hypomagnesaemia
- IV Push in cardiac arrest. IO
- Over 1-2 minutes when patient is not in arrest.
- 2 grams (4 mL) IV/IO over 2-3 minutes
- 4 grams (8 mL) IV over 2-3 minutes:
- 8 grams (16 mL) IM if an IV is unobtainable
- 4 grams in each dorsogluteal muscle (upper buttock)
- Essential for the activity of many enzymes
- Plays an important role in neurotransmission and muscular excitability
- Overall is a CNS and muscular depressant
- Heart block
- Active labor
SPECIAL NOTES / RESTRICTIONS:
- Bradycardia, Hypotension, Hyporeflexia, Diaphoresis and Drowsiness, Decreased respirator rate, Flaccid Paralysis
- Magnesium insufficiency should be suspected in patients who use diuretics and in patients with poor dietary habits, poor nutrition, or poor dietary intake (may be seen in chronic alcohol abuse).