Hypomagnesemia: Difference between revisions
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(Add MedicationDose entries (magnesium sulfate) with SMW annotations) |
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==Clinical Features== | ==Clinical Features== | ||
*CNS | *CNS | ||
**Muscle weakness | **[[Muscle weakness]] | ||
**[[Ataxia]] | **[[Ataxia]] | ||
**[[Confusion]] | **[[Confusion]] | ||
**[[Seizures]] | **[[Seizures]] | ||
**Coma | **[[Coma]] | ||
*GI | *GI | ||
**Dysphagia | **[[Dysphagia]] | ||
*Cardiovascular | *Cardiovascular | ||
**[[CHF]] | **[[CHF]] | ||
**[[Dysrhythmias]] | **[[Dysrhythmias]] | ||
**Hypotension | **[[Hypotension]] | ||
*Miscellaneous | *Miscellaneous | ||
**[[Hypokalemia]] | **[[Hypokalemia]] | ||
| Line 50: | Line 50: | ||
*Serum level <1.2 | *Serum level <1.2 | ||
**4g [[MgSO4]] IV over 2 hours | **4g [[MgSO4]] IV over 2 hours | ||
==Medication Dosing== | |||
{{MedicationDose | |||
| drug = Magnesium sulfate | |||
| dose = 2g | |||
| route = IV | |||
| context = Serum Mg 1.2-1.7 (symptomatic or no POs) | |||
| indication = Hypomagnesemia | |||
| population = Adult | |||
| notes = Infuse over 1 hour | |||
}} | |||
{{MedicationDose | |||
| drug = Magnesium sulfate | |||
| dose = 4g | |||
| route = IV | |||
| context = Serum Mg <1.2 | |||
| indication = Hypomagnesemia | |||
| population = Adult | |||
| notes = Infuse over 2 hours | |||
}} | |||
==Disposition== | ==Disposition== | ||
Latest revision as of 18:23, 20 March 2026
Background
- Hypokalemia, Hypocalcemia and hypophosphatemia are often also present
Clinical Features
- CNS
- GI
- Cardiovascular
- Miscellaneous
Differential Diagnosis
Causes of hypomagnesemia
- ETOH
- Malnutrition
- Cirrhosis
- Pancreatitis
- After DKA
- GI loss (especially diarrhea)
- Renal wasting
- Type 2 diabetes mellitus[1]
Evaluation
- Magnesium level
- Also check:
- Chemistry
- Phosphate
Management
- Serum level >1.7
- No treatment
- Serum level 1.2 - 1.7
- Serum level <1.2
- 4g MgSO4 IV over 2 hours
Medication Dosing
Magnesium sulfate 2g IV — Infuse over 1 hour Magnesium sulfate 4g IV — Infuse over 2 hours