Neuroleptic Malignant Syndrome and Serotonin Syndrome NCLEX Review

Flashcards covering clinical features, pathophysiology, nursing priorities, pharmacology, and distinctions between neuroleptic malignant syndrome (NMS) and serotonin syndrome.

What is the primary physiological mechanism that causes neuroleptic malignant syndrome (NMS)?

Antipsychotic medications block dopamine too strongly in the brain, leaving the patient with very low dopamine levels necessary for normal function.

When is neuroleptic malignant syndrome (NMS) most likely to develop in a patient?

It usually happens shortly after starting an antipsychotic medication or after increasing the dosage.

What are the four primary clinical manifestations of neuroleptic malignant syndrome (NMS)?

Severe muscle stiffness, very high fever, confusion, and unstable vital signs.

What is the priority first step a nurse must take if a patient exhibits signs of neuroleptic malignant syndrome?

Stop the medication right away and immediately notify the healthcare provider.

What non-pharmacological interventions are used to cool down a patient with NMS experiencing hyperthermia?

Cooling blankets, ice packs placed on the hands and feet, and applying a cotton pad dipped in ice-cold water to the forehead.

Why is increasing IV fluids critical in the management of neuroleptic malignant syndrome?

It treats dehydration and protects the kidneys from dysfunction caused by muscle breakdown products.

What is the pharmacological action of dantrolene (dentrolene) in treating NMS?

It relaxes tight, stiff muscles to prevent muscle breakdown and protect the functions of organs such as the kidneys and heart.

What is the therapeutic purpose of administering bromocriptine to a patient with NMS?

It acts to reboost and restore the actions of dopamine in the brain.

How does the underlying neurotransmitter imbalance of serotonin syndrome differ from that of NMS?

NMS is caused by very low dopamine due to blockage, whereas serotonin syndrome is caused by too much serotonin.

What are common medication-related causes of serotonin syndrome?

Giving an excessive dose of a serotonergic drug, switching medications, combining two serotonergic drugs, or accidental dosage miscalculations by the nurse.

What mental status changes are observed in patients with serotonin syndrome?

Agitation, confusion, restlessness, and anxiety.

What autonomic signs and symptoms are seen in a patient with serotonin syndrome?

Fever, sweating, tachycardia, hypertension, and diarrhea.

Which neuromuscular assessment findings serve as the hallmark sign distinguishing serotonin syndrome from NMS?

Tremors, hyperreflexia, and muscle twitching or involuntary jerky movements (compared to the severe rigid stiffness of NMS).

What critical question should a nurse ask when investigating a sudden acute deterioration in a patient's condition?

What was done or what new medication was introduced into the patient's system within the last $8\,\text{hours}$?

What safety precautions and environmental modifications should be implemented for a patient with serotonin syndrome?

Place the patient on seizure precautions and reduce environmental stimulation by providing a quiet room with low lighting.