Degradation of TriMix from being at room temp seems to be over emphasized. It doesn't seem to happen as fast as we worry. There was a study paper posted on another thread here recently that showed that TriMix left at room temp for 5 days had an 8% decrease in prostaglandin (the component that goes bad when warm).
I'm not suggesting that we should all leave our vials out at room temp for days at a time, but you could leave a prefilled syringe in the bathroom hours before the date and it should still work fine when the need arrises.
And if you don't need it, toss it. A dose is a few bucks.
51yo. Progressively worsening ED over 6 years. No HTN, DM, or related health issues. 20-40mg of Sildenafil or TriMix (30mg, 4mg, 40mcg) 25units. Doses have been increasing so staying open to the idea of an implant. Pumping daily to maintain size.