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Manifestations: The manifestations of INAPSINE (droperidol) overdosage are an extension of its pharmacologic actions and may include QT prolongation and serious arrhythmias (e.g., torsade de pointes) (see Box Warning, WARNINGS, and PRECAUTIONS).
Treatment: In the presence of hypoventilation or apnea, oxygen should be administered and respiration should be assisted or controlled as indicated. A patent airway must be maintained; an oropharyngeal airway or endotra-cheal tube might be indicated. The patient should be carefully observed for 24 hours; body warmth and adequate fluid intake should be maintained. If hypotension occurs and is severe or persists, the possibility of hypovolemia should be considered and managed with appropriate parenteral fluid therapy (see PRECAUTIONS).
If significant extrapyramidal reactions occur in the context of an overdose, an anticholinergic should be administered. The intravenous Median Lethal Dose of INAPSINE (droperidol) is 20 to 43 mg/kg in mice; 30 mg/kg in rats; 25 mg/kg in dogs and 11 to 13 mg/kg in rabbits. The intramuscular Median Lethal Dose of INAPSINE (droperidol) is 195 mg/kg in mice; 104 to 110 mg/kg in rats; 97 mg/kg in rabbits and 200 mg/kg in guinea pigs.
INAPSINE (droperidol) is contraindicated in patients with known or suspected QT prolongation (i.e., QTc interval greater than 440 msec for males or 450 msec for females). This would include patients with congenital long QT syndrome.
INAPSINE (droperidol) is contraindicated in patients with known hypersensitivity to the drug.
INAPSINE (droperidol) is not recommended for any use other than for the treatment of perioperative nausea and vomiting in patients for whom other treatments are ineffective or inappropriate (see WARNINGS).
Last reviewed on RxList: 6/5/2008
This monograph has been modified to include the generic and brand name in many instances.
Additional Inapsine Information
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