Suggest Treatment For Gastritis And Sleep Disorder

Hi, My mother recently saw joint pain in hands and legs. One doctor told us that its rhemetoid artheritis. She had few medicines. but gastric situation compelled her to stop meds. she saw much gas and acidity problem with meds. after meds were stop, she is not eating regularly. when she eats, gas problem erupts and she is not able to sleep at night. if she do not eat, she feels little hungry but is able to sleep. she is losing weight constantly. she lost 10kg in 2 yrs. she is 52yrs old. pls advise to solve gas problem and sleep disorder.