Answer
Weakening or loss of tendon reflexes can indicate excessive neuromuscular blockade and may precede more serious toxicity, including respiratory depression.
Sources for this answer
- Magnesium Sulfate 50% w/v Solution for Injection/Infusion — Current selected SmPCemc · Summary of Product Characteristics
- Magnesium Sulfate 10% w/v solution for infusion — Current selected SmPCemc · Summary of Product Characteristics