Final answer:
Neuroleptic malignant syndrome (NMS) is a life-threatening adverse reaction to antipsychotic medications. The treatment involves stopping the medication and providing supportive care.
Step-by-step explanation:
The life-threatening adverse reaction to antipsychotic medications that you're referring to is called neuroleptic malignant syndrome (NMS). NMS is a rare but potentially fatal condition that can occur as a side effect of antipsychotic medications.
The treatment for NMS involves stopping the medication that caused the reaction. Supportive care is also provided, which may include intravenous fluids to prevent dehydration, medications to lower body temperature, and monitoring of vital signs such as blood pressure and heart rate.
If NMS is diagnosed early and treatment is initiated promptly, the prognosis is generally good. However, it's important to seek medical attention immediately if you or someone you know experiences the symptoms you described.