NMS-EPS-Serotonin Synd

NMS (Neuroleptic Malignant Syndrome)

  • Definition: A serious reaction to antipsychotic drugs characterized by the following symptoms.

  • Symptoms:

    • Fever: High body temperature as a significant symptom.

    • Encephalopathy: This leads to confusion or altered mental status.

    • Vitals Unstable: Fluctuations in physiological measurements such as heart rate, blood pressure, etc.

Serotonin Syndrome

  • Definition: A potentially life-threatening condition due to increased serotonergic activity in the central nervous system.

  • Symptoms:

    • Fever: Elevated temperature as a key feature.

    • Rigidity: Specifically described as "lead-pipe" rigidity, a form of muscular rigidity.

    • Agitation: Increased mental and emotional activity leading to restlessness.

    • Hyperreflexia/Clonus: These include exaggerated reflexes and rapid contraction and relaxation of muscles leading to tremors.

Examples of Medications Leading to Symptoms

  • Haloperidol: An antipsychotic that can trigger NMS.

  • Chlorpromazine: Another antipsychotic linked to the aforementioned symptoms.

  • Sertraline: An antidepressant associated with serotonin syndrome.

  • Amitriptyline: A tricyclic antidepressant that can also lead to serotonin syndrome.

EPS (Extrapyramidal Symptoms)

  • Dystonia: Sustained muscle contractions, leading to abnormal movements and postures.

  • Muscle Spasms: Involuntary muscle contractions occurring frequently in this condition.

  • Akathisia: A state of restlessness and an urgent need for movement, which can be distressing.

  • Parkinsonism: Symptoms mimic Parkinson's disease and include:

    • Tremor: Involuntary shaking, often at rest.

    • Shuffling Gait: Characterized by a dragging walk that is typical in Parkinsonism.

  • Connection to Antipsychotics: The symptoms of EPS and NMS are often exacerbated by the use of antipsychotic medications, indicating the need for careful monitoring and management of these patients.