Methadone during anesthetic induction was effective for analgesia in large size surgeries. Lower incidence of nausea and vomiting was observed in the methadone group and therefore it is a low cost option available among us that should be stimulated.
These results contradict those found in human beings regarding the pure levorotatory isomer, but confirm recent animal studies. One must be very careful when extrapolating animal data to human beings. Further studies involving larger samples and more homogeneous groups are necessary.
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