Patients with lactose intolerance who experience nausea can consider using some medications for symptomatic treatment. For example, they can use meclozine orally or by muscle injection. They may also use medications that promote gastric motility, such as domperidone, mosapride, and itopride, to treat impaired gastric motility. Patients with lactose intolerance may also experience bloating, vomiting, abdominal pain, diarrhea, and constipation. Appropriate symptomatic treatments can be taken according to different symptoms. Lactose intolerance, if due to a secondary disease such as Crohn's disease or ulcerative colitis, requires active treatment of the primary disease. (The use of medications should be under the guidance of a professional doctor.)