Methadone is not a new analgesic drug [69]. Several studies have demonstrated that methadone is a valid alternative to morphine, hydromorphone, and fentanyl for the treatment of cancer-related pain, and extensive reviews on the subject have been…
It is well known that a variety of stressors influence immune responses. The opioid peptide-beta-endorphin (BE) is deeply involved in stress responses, is synthesized in cells of the immune system, and participates in the modulation of immune…
