So hypothetically if someone wanted to take a "little break" for whatever reason say they were at goal weight or they were pinning something else and didn't want the interaction...it takes about 30 days to completely clear any tirzepetide/semaglutide from your system. After this point is when the body starts to make "memory T cells" right? It would be more beneficial to stay on a low maintenance dose just to make sure its never cleared from your body (if you have intentions of ever getting back on a glp1)
As long as someone keeps a low dose in their body stretched no longer then 30 days between injections that will help prevent this future reaction. I'm sure tons of people stop GLP-1s all together thinking they will never need them again and then oopsy gained all that weight back and now its going to be a lot more difficult to lose it.
That is considering they can afford the long-term low maintenance dose especially if they are paying out of pocket for pharma grade.
So unfortunately we're dealing with a lot of unknowns, largely because peptide pharmaceutical development is all about finding a formula, manufacturing method, and treatment plan that avoids immunogenicity problems, long before the first human trials begin.
The best we can do is draw conclusions from drugs that, despite appearing to have no immunogenicity issues, end up having them once patients have been using them for a while, and there are numerous examples, including GLP class pharmaceuticals.
The problem of "reexposure immunogenicity" has been dealt with successfully by maintaining a small dose, That suggests that as long as there's some level of the drug present, "memory t-cells" don't become a problem.
So 5 half lives are needed for complete elimination after the last dose.
35 days for Sema
25 days for Tirz
But that's on average. Some people will rid themselves more quickly, and it's been suggested UGL copies also have a shorter half life.
Without specifically studying a particular compound, no one knows how much time after complete elimination it takes this "reexposure immunogenicity" to develop. But the longer the gap the worse the risk.
So the best strategy would be to stay on a small dose rather than stop entirely.
Next best would be not letting more than the time above elapse before getting back on.
Finally, keeping the gap in treatment as short as possible would he better than allowing a long gap.
No guarantees with any of this, but based on what's known, this is the way to minimize the potential of reexposure immunogenicity.