The following adverse experiences were reported with a frequency of less than 1% in clinical trials and were considered to be probably related to the use of butorphanol: See Table 2.
The following infrequent additional adverse experiences were reported in a frequency of less than 1% of the patients studied in trials of Butorphanol Tartrate Injection and under circumstances where the association between these events and butorphanol administration is unknown. They are being listed as alerting information for the physician due to their clinical significance. (See Table 3.)
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