All oil based tests have alcohol in them. As to how much it depends on who made it. The less the BA the less painfull in my experience.
After some research on test flu, it seems as though
"tru test flu is caused by an allergic reaction to a metabolite of the test being broken down. Your body gradually adjusts to the metabolite and is the reason why in most people after a few weeks the symptoms are gone." Quoted from liftsiron.