摘要：

Onsolis~TM (fentanyl buccal soluble film) has recently been approved by the US FDA for the treatment of breakthrough cancer pain. Onsolis delivers an opioid drug termed fentanyl via an absorbable film that adheres to the inside of a patient's cheek.Pain can be caused by cancer or can present as a side effect of the disease. If this pain is not managed correctly, it can have a significant effect on an individual's quality of life. Opioids are selected to treat chronic pain in many cancer sufferers, but they continue to experience flares of pain referred to as breakthrough pain. This can become intensely painful within just a few minutes, and opioids can take up to an hour to take effect.

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