Occurred rather frequently: Apnea, flushing (but less frequent if administered intravenously), and bradycardia.
Occurred sporadically: Seizures, hypotension, tachycardia, and diarrhea.
The relationship of the following adverse events to the drug is unknown. In order of decreasing frequency, they were: sepsis, cardiac arrest, disseminated intravascular coagulation, hypokalemia and edema.
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