Yes, and if death from anaphylatic shock seemed to be imminent, I would even take my chances on using an epipen with discolored contents. Products that are beyond there recommended shelf lives typically lose their potency very gradually. In a true emergency, who cares if it is only 75% as potent as a fresh product?...it’s still probably good enough!
I once had a surprise throat-closing incident from something I ate. I crushed a bunch of Vitamin C tablets in orange juice and drank it down. Opened up my airway just enough until help arrived.