Look, this question about refrigerating T cyp comes up a lot. The label says keep it cold, but the clinic doesn’t mention it, so it ends up in a drawer. For most guys, it’s probably fine. Honestly.
But I’ve tracked every single injection in a spreadsheet since I started TRT three years ago, and I can tell you the stability issue is measurable, not hypothetical. I keep separate lines for home vials versus vials I’ve packed for travel. Ngl, the vials that travel with me show a difference. After a week in a carry-on bag, getting hit by airport scanner heat, then sitting in a hotel room where the AC is off half the day…
you can feel it by the last 10-20% of the vial. It’s not a cliff, just a subtle drop-off.