Hours in a hot car is a different story
The good news is that there is no absolute contraindication to taking these medications together, and many individuals successfully use both under appropriate medical supervision
Diabetes 64:25372549 Zaghloul MS, Elshal M, Abdelmageed ME (2022) Preventive empagliflozin activity on acute acetic acid-induced ulcerative colitis in rats via modulation of SIRT-1/PI3K/AKT pathway and improving colon barrier
If the vial may have frozen: discard it
J Pharmacol Exp Ther 369:129141 Gergs U, Jung F, Buchwalow IB, Hofmann B, Simm A, Treede H, Neumann J (2017) Pharmacological and physiological assessment of serotonin formation and degradation in isolated preparations from mouse and human hearts
In order to ensure that it doesn't denature, it's best to be kept airtight before use, which is why it in produced in oral syringes