Hi, ragtop and others:

Does what you said about weighing Janssen fentanyl patches and Sandoz fentanyl patches apply onlo to patches with a reservoir? What about patches without a reservoir?

I do not trust generic patches. I have several official documents saying that medications, such as fentanyl patches, with a narrow therapeutic range, should not be switched. The documents I have (they are at home) are from the Belgium equivalent of the FDA. There are also other documents, which I will have to look for and find.

I will ask my primary care doctor, if he agrees, to put "Do not substitute" on the brand name fentanyl patches prescription.

What do you think?