- 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.
- Cardiac Arrest: 1-2 Grams, IV up to 15 Grams
- Eclampsia/Preeclampsia: 4 grams IV over 30 minutes: Add 4 grams to a 50cc bag with a 10ggts run at 15gtts per min (1 drop every 4 seconds) 8 grams IM if an IV is unobtainable - 4 grams in each dorsogluteal muscle (upper buttock)
- Eclampsia: 25-50 mg/kg to max 2gm over several minutes for arrhythmias 15-20 minutes for hypomagnesaemia
- 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).