Duragesic, for patients experiencing moderate to severe chronic pain, contains fentanyl, an opioid that could lead to problems such as respiratory depression and fatal overdose.

• 多瑞吉，用于中等强度或严重的慢性的疼痛患者，包含芬太尼，一种阿片样物质，可能导致像呼吸抑制和过量致死等问题的发生。