Severe Symptomatic Hypermagnesemia Associated with Over-the-Counter Laxatives in a Patient with Renal Failure and Sigmoid Volvulus

Table 1

Dose related manifestations of hypermagnesemia [6].

Serum magnesium level (mg/dL)	Dose related effects
1.7–2.4	Normal serum levels
5–8	Nausea, headache, light headedness, cutaneous flushing
9–12	Absent deep tendon reflexes, somnolence, hypotension
12–15	Sinoatrial and atrioventricular block, muscle paralysis, hypoventilation
>15	Cardiac asystole, respiratory arrest, coma