text_1: A patient with COPD was receiving 12.5mcg of fentanyl. The gp double this dose to 25mcg. The patient died two weeks later. Is there any correlation?
text_2: My aunt had COPD and she was on 12.5mcg fentanyl. Her doctor doubled up her dose as her symptoms got worse and she died after 2 weeks. Do you think she died due to the overdose of fentanyl?