Does red bull cause, actually cause, peptic ulcers, or would it only act as an irritant to them? i have drunk it since the early 2000s.

Red Bull gives u...: Prima fasciae the answer is no. I would twist the question to ask, "why do you ask?" and "why do you drink red bull." further, one might ask do you have pain and where, when, and what makes it worse. A nonsmoking social drinker of 43 years, i might suggest you seek a one one one evaluation for the source of your concern might not be what you think they are--e.g. Heart, stomach, pancreas, etc.

See details.: It makes ulcers much worse as the high caffeine content stimulates the production of stomach acid. Stop drinking it.