 [ Symptoms ] my boyfriend takes ibuprofen every day he lost his appetite has nausea & a bad stomachache could it be an ulcer  i do not think he has a stomach virus because he has not thrown up also i have been exposed to him i live with him and i am immune deficient but have not gotten ill [ Disease ] ibuprofen can cause gastritis and stomach ulcers but i would really have no way of knowing if this is the cause of your boyfriend is symptoms he would be wise to see a medical provider so he can be properly examined diagnosed and treated