Jak, I know I'm coming into this late, but last fall I had transforaminal injections in L4, L5, and S1. I was told to rest on injection day...veg out on the couch, no riding in cars except to go home from dr office, couldn't even go out and throw hay to the horses. My instructions also were to continue taking the meds as prescribed (lyrica, elavil, tramadol). It sounds like you had the same procedure I did and hopefully this will help answer your question.

Was this your first injection? Mine were a series of 3, 3 weeks apart. They didn't stop the pain but they did give me some relief that lasted almost six months.