SWIMBTIMJLY knows a little bit about these patches!
Unless the OP has gotten his hands on some REALLY old stock: they cannot be gel patches (they simply don't make them anymore). And if this indeed be the case: they would have expired years ago anyway (although that's no guarantee that the Fentanyl has degraded to the point where said patches are now benign).
Fortunately the OP knows the difference between mg and µg (the latter sometimes erroneously abbreviated to mcg) and realizes that the total amount of Fentanyl in a patch is measured in mg as opposed to µg. What the OP may not know is that the LD50 in humans, assuming little to no tolerance, is 2mg. In other words: 2mg of pure pharmaceutical Fentanyl (which is what you're dealing with) is enough to kill 50% of test subjects (average humans) (whatever that means). So let that sink in for a minute. This if said 2mg is administered all at once and route of administration dependent (affects bioavailability). But read on i.e. it gets better and more fun as we go along.
Be careful applying multiple patches to the skin and then still using more via different routes of administration. It takes anywhere between 24 - 72 hours for serum concentrations of Fentanyl to reach a peak (when using the patches as directed i.e. applied to the skin). And the Fentanyl doesn't simply disappear into the ether and as if by magic once you remove the patches (removing them isn't an off switch). Point being: it's easy to reach dangerous levels due to accumulation. More than one story going around where somebody has applied patches, because of the long onset of action they felt nothing so applied more, then more, then got bored and decided to cheek some, and, well the rest is history and they're now nothing more than a statistic. And in an opioid intolerant individual: when Fentanyl hits it hits hard i.e. there's nothing gradual about it It's pretty easy to go from hero to zero in a few seconds is my point (especially if the Fentanyl is extracted and/or alternate routes of administration are employed) (possible exception being ingestion but that's also dose dependent) (look up the term "fentanyl bioavailability").
As has been noted already: using benzodiazepines with Fentanyl is definitely out of the question unless you have a death wish. It's one of the reasons why Fentanyl laced Xanax pills are a firm favorite among the dead. And the list of dangerous interactions with other medications, not to mention the underlying health condition of the individual, goes on. Feel free to peruse the information on the link below. Once you get to the end: if you still think it's a good idea well then have at it I guess.
As for being concerned for your health and well being: I put it to you that even without Fentanyl you're already on shaky ground with, what appears to be anyway, poly drug abuse. Deal or no deal: dump them would be my advice. Sorry: I'm not from the PC harm reduction fraternity (any longer).
Fentanyl transdermal patch is a prescription medication that's used to treat chronic pain in opioid-tolerant people. Learn about side effects, warnings, dosage, and more.
www.healthline.com
Anyway. One thing led to another and here I (still) am! 