I read the antibiotic increases the fent. I guess i am quite tolerant. I have 225mcg on and its not helping my pain or i am not absorbing enough. I dont feel high or dopey. I can swallow 240mg of oxy before the patch and that was to just nod a little. I asked to try a diff patch but i was told it dont matter so i put more on. So anyone here know how much of the antibiotic to take. I got like 30-500mg tabs. Just trying to get relief. And then extend whats on my body for the next refill. Smh. Wished one 50 would work but it didnt. This is crazy why is it not working on my skin? Its very stretchy and thin. I used to weigh a lot then lost it so i have excess. Just trying to figure out how i will function on this patch. Tia