1. If you take a large amount of solution with high concentration during catharsis, you may absorb a large amount of water from your self-organization and cause dehydration. The gastrointestinal tract has ulcers and damages, which are easy to cause magnesium ion absorption and poisoning. It is forbidden for catharsis in patients with intestinal bleeding, acute abdomen, pregnant women and menstrual women.

2. Intravenous drip is dangerous. It should be done slowly and 10% calcium gluconate injection should be prepared for rescue. When poisoning occurs, it should be treated by intravenous injection of calcium chloride or calcium gluconate immediately and slowly. Dialysis therapy can quickly remove magnesium ions from the body.

3. Intravenous injection of magnesium sulfate heptahydrate often causes flushing, sweating, dry mouth and other symptoms. Rapid intravenous injection can cause nausea, vomiting, panic, dizziness, individual nystagmus, slow down the speed of injection symptoms can disappear.

4. Before and during each medication, the knee tendon reflex was examined regularly and the number of breaths was measured. Observe the symptoms of magnesium poisoning in time.

5. For those with renal insufficiency, the dosage of injection should be reduced. For those without urine, it should be forbidden, because it can lead to magnesium accumulation poisoning.

6. Magnesium sulfate heptahydrate has myocardial damage, respiratory disorders, severe renal insufficiency, and should be used cautiously or not when conduction block occurs.