I was also wondering if anyone has experience with Fentanyl analogues? I was looking into BF & 4FBF and was wondering what dosing is like on these analogues, I have tried to do research but couldn't find much consistency on the web. If my tolerance is 75mg of methadone a day to get by and I would say about 100-115mg of methadone to get high, what would be a recommended starting dose for BF or 4FBF? Lastly, what is the best method of administration? I would not be interested in IV'ing or swallowing, but bioavailability wise which is higher smoke, snort, or sublingual ?
Fentanyl analogues are even more dangerous than fentanyl and very little is known about them. Many fentanyl analogues are even stronger than fentanyl, some
much stronger. If you are getting them online who knows whether they are pure on not and therefore what an appropriate dose would be. You'd absolutely need to have a very sensitive scale to measure it with. Some opioid RCs also contain toxic impurities. I would seriously stay away from them!
As for the specific ones you mentioned, BF is
claimed to be similar to fentanyl, and 4FBF is supposed to be longer-lasting than fentanyl. I have no idea about potency/doses and that would depend on whether it is pure or is cut with something. As for ROAs, BA is not the only thing that matters, different ROAs are going to have different safety levels, different onsets, different peaks, and different durations. Please, mis-using a fentanyl patch where you actually know what's in it is dangerous enough, DO NOT use any fentanyl analogues.
Also do not rely on posted conversions for a STARTING dose, real-life conversions can very greatly from person to person.
Whenever trying a new opioid start with a very small dose. You can't really come up with even a rough conversion between methadone and fentanyl anyway, because the published conversions are for comparing total daily methadone dose to an appropriate strength of fentanyl patch used as directed that has been found in a study to have roughly the same analgesic effect. If you're going to be taking fentanyl by a different ROA it will be
much shorter-lasting and stronger. You can not just use, say, the equivalent daily dose for fentanyl all at once, that would be too much. Does this make sense?
Going to move this to OD so hopefully you'll get some more info.
BDD -> OD