Thanks for the replies, everyone. Just to clarify my question a bit, I think you hit it at the end of your post pretty well, amapola. I am especially interested here in the duration of acute withdrawal after quitting daily use specifically, split into either less or more doses/day. To put into perspective, generally longer half-life -> longer withdrawal, not considering intensity (e.g., fentanyl vs. methadone). Now repeatedly dosing a short acting opioid over the course of a day does not lead to a withdrawal duration of a long acting opioid (e.g., bear with my hypothetical math here...but dosing fentanyl split into 10 doses/day does not produce a later withdrawal close to as long lasting as methadone). But what I am trying to get at, carrying from this example, is would dosing 1/10th of a dose, 10 times a day of fentanyl, produce a longer lasting withdrawal (i.e. resembling a longer acting opioid) than a full dose one time / day, regardless of the treatment efficacy / "prognosis" of this type of dosing schedule?
I don't mean to quantify this too much, but really am just looking for any general rules of thumb that people may have read about or experienced personally. Thanks, all!