Narcotic Chemical Classes
Allergic reactions may occur within the same chemical structural class (cross-reaction), but are less likely between classes.  If a patient exhibits a true allergic reaction, treatment with an agent in one of the other chemical groups is recommended
Phenanthrenes				Phenylpiperidines				Phenylheptanones
Butorphanol				Alfentanil				Methadone
Codeine				Fentanyl				Propoxyphene
Hydrocodone				Meperidine
Hydromorphone				Sufentanil
Levorphanol
Morphine
Nalbuphine
Oxycodone
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