The reasons were either rapid delivery, analgesia refused, randomisation error or received meperidine (pethidine) or epidural respectively.
The class includes morphine, codeine, and a number of semi-synthetics including meperidine (Demerol), propoxyphen (Darvon), and others.
Synthetic compounds that resemble morphine in their chemical structure: Narcotics in this group include fentanyl (Duragesic), levorphanol (Levo-Dromoran), meperidine (Demerol), methadone, and propoxyphene (Darvon).
SSRIs should not be used with any drug that increases serotonin concentrations, including MAO inhibitors, tramadol, sibutramine, meperidine, sumatriptan, lithium, St. John's wort, ginkgo biloba, and some anti-psychotic agents.
However, dextromethorphan should not be used in combination with narcotic analgesics such as meperidine or codeine, since dextromethorphan will increase the side effects of the analgesic.
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