Its time for my 2 cents on the Fent, diff types and ways of use. Tolerance and all.
For me personally. The best RoA is up the nose. I know alot of people put in nasal spray bottles and all. I just use a straw, gravity syphon about a ml of water, or roughly 2-3 teardrops worth. squeeze the gel into the water, it floats, then suck it up with a straw. As long as you dont have too much water, the solution will simply carry the gel up the straw, and when the water absorbs the fent is left in the mucas membrane. It can take a bit longer this way i imagine, 20min or so for effects to peak.
Now as for tolerance, I know everyone talks about how strong this stuff is, but this ruined my experience the first several times, as i was a bit , too cautious. It takes me a full 50mcg patch to get where i want to be. A full 5mg of fent i just finished and im opening another patch. I lean towards D most the time, since it is decent in my area and fairly cheap. Blue stamps with 14 in a B. I typically do a full 2 b's up the nose when I have that stuff. so in comparison, 5mg of fent, is roughly = to 1b of D.
Before I go on and on about all aspects, ill post this and if anyone gives a damn, I got all the info you could want. Just ask (minus the chemical reactions and all) I have tried almost all extraction processess with the matrix patches too, and IMO, the are worthless. Best thing to do with matrix is, wear your tolerance, and get more of your DofC to cap it off. Also, matrix patches seem to last min of 4 days, but they are not as strong. and yes, cheeking does work, but for me seems after 4hrs it just cant work any faster.