MH PHARM | Ziprasidone [Geodon]

1. Medication Name/ClassGeneric/Brand: Ziprasidone (Geodon).Class: Atypical Antipsychotic, Serotonin-Dopamine Antagonist (SDA).2. Mechanism of ActionAntagonizes dopamine D2 and serotonin 5-HT2A receptors. Modulating mesolimbic dopamine reduces positive symptoms; mesocortical serotonin modulation targets negative symptoms.3. Expected Action/Therapeutic EffectReduces positive and negative psychotic symptoms and rapidly controls acute agitation.4. IndicationsSchizophrenia, Bipolar I (acute/maintenance), and acute agitation (IM route only).5. PharmacokineticsAbsorption: PO bioavailability is ~60% but requires food to double absorption.Peak/Half-life: PO peaks in 6-8 hrs (half-life 7 hrs). IM peaks in ≤1 hr (half-life 2-5 hrs).Metabolism: Hepatic (minor CYP1A2/3A4 substrate).6. Drug-Drug InteractionsHas minimal CYP450 interference. Poses a high risk when combined with other CNS depressants or any QT-prolonging agents.7. Side Effects vs Adverse EffectsCommon: Drowsiness, insomnia, weight gain, nausea, and EPS (akathisia).Serious: QT prolongation, Neuroleptic Malignant Syndrome (NMS), Tardive Dyskinesia, DRESS, and Stevens-Johnson syndrome.8. Contraindications/PrecautionsElderly: Avoid in dementia-related psychosis.Renal: Use IM formulations with caution due to the cyclodextrin excipient clearance.9. Nursing InterventionsSafety: Handle as a hazardous drug (Group 3).PO Admin: Administer whole; never crush or chew.IM Admin: Reconstitute ONLY with Sterile Water. Keep the patient recumbent for ≥30 mins post-injection to prevent severe hypotension.Monitor: Baseline/ongoing ECGs (QTc) and sodium levels (due to SIADH/hyponatremia risk).10. Patient EducationTake capsules whole, always with food, at roughly the same time daily.Immediately report palpitations, fainting, muscle stiffness, or rashes.11. Black Box Warning/AntidoteBBW: Increased mortality (typically heart failure or pneumonia) and increased stroke risk in elderly patients with dementia-related psychosis.12. Nursing School Priority SummaryMust Know: PO dosing strictly requires food for absorption; always monitor ECG for QT prolongation.Nice to Know: Ziprasidone is not removed by hemodialysis.Test Trap: Failing to keep IM patients flat for 30 minutes, risking orthostatic hypotension.Clinical Red Flag: Sudden fever, muscle rigidity (NMS), or arrhythmias.One-Sentence Memory Hook: "Ziprasidone zips the heart rhythm (QT risk) and needs a meal to zip through the gut."