The most common signs and first signs of magnesium sulfate toxicity are nausea, feeling of warmth, flushing, somnolence, double vision, slurred speech and and weakness including muscle weakness.
If not treated for magnesium sulfate toxicity Muscular paralysis and respiratory arrest will develop at plasma levels of 6.3 to 7.1 mmol/Ll4.
You should always see a doctor go to urgent care or the emergency room if you've gotten magnesium sulfate toxicity.