Full honesty - I don’t know the first thing about testosterone. But when I found a 3-year-old semaglutide vial in my bathroom, I spiraled. Looked fine. Smelled normal. But the internet said expired was dangerous, and my brain took it from there. My NP said storage matters way more than age. Room temperature, no light exposure, no wild swings. If it looked clear, compound stability probably held. Bacterial growth is slower than we worry it is. Your quad pain though - keep an eye on that. Injection site reactions happen regardless of vial age. Swelling, warmth, spreading redness is a call your doc moment. Pain alone can stick around for a week. I think the shame part matters here. You did something you found out you weren’t supposed to do. Most of us have. That doesn’t mean you hurt yourself. But knowing the difference between actual risk and breaking protocol - that’s the thing worth sitting with.
“clear doesn’t mean potent” is the part i’d push back on. the steel-man is fair, storage really does dominate the age label and the room-temp/no-light/no-swings rule is the right rule. and your NP isn’t wrong that bacterial growth on a properly stored peptide solution is slower than the panic on this sub implies, sterility and degradation are different questions. but peptide degradation is invisible. sema can hydrolyze, deamidate, or aggregate into inactive fragments with zero visible change in the vial. the published stability data i’ve seen on the branded versions caps out around 2 years refrigerated, and that’s with the full excipient profile (the phenol, the buffer, polysorbate 80 in some formulations) doing real work to hold the molecule together. compounded vials don’t always run the same excipient stack and the stability data on those is much thinner. 3 years sitting on a bathroom counter is well outside anything i’ve seen documented for any version. the practical failure mode: even if the vial isn’t dangerous, you might be injecting something where a meaningful chunk of the active molecule is now degradation product. you’d notice it as “this dose isn’t suppressing food noise like it used to” and chalk it up to tachyphylaxis or a bad batch when it’s actually just half-dead peptide. that’s the risk i’d name, not infection. re: the shame part, that piece lands. the “knowing the difference between actual risk and breaking protocol” frame is the right one to sit with. i’d just add potency loss as a third category, neither dangerous nor really protocol-breaking, but it still matters for whether the shot is doing what you think it’s doing. caveat my window, week 18 sema, compounded, no polysorbate 80 in my formulation, so my read on excipient stability skews toward the simpler stack. ymmv on the branded pens with the full buffer system, those probably hold longer than what i’m using would.
where you lose me is ‘you’d notice it as tachyphylaxis.’ tachyphylaxis is already invisible, you don’t blame the vial, you blame yourself, and from inside your head potency loss and tolerance feel exactly the same. idk, fair point on the compounded data gaps, but 3 years at room temp in a stable home probably isn’t the same degradation risk as the actively degrading kind. maybe half-potent either way, and half-potent sema probably still suppresses something
“bacterial growth is slower than we worry it is” mostly holds for an intact vial, but once the stopper’s been punctured a dozen times the preservative load drops and the sterility math is genuinely different. sealed 3yo and in-use 3yo aren’t the same risk profile imo.