Side effects of magnesium sulfate injection include:
- heart disturbances,
- breathing difficulties,
- poor reflexes,
- confusion,
- weakness,
- flushing (warmth, redness, or tingly feeling),
- sweating,
- lowered blood pressure,
- feeling like you might pass out,
- anxiety,
- cold feeling,
- extreme drowsiness,
- muscle tightness or contraction, or
- headache.