Lactose intolerance can lead to vomiting, which can be managed based on the condition by symptomatic treatment. For example, Metoclopramide can be used orally or through muscle injection to alleviate vomiting. If necessary, chlorpromazine injections can also be used for treatment. The choice of specific medications and their administration must adhere to medical advice. In addition to addressing the symptoms, it is essential to treat the primary disease causing lactose intolerance. For instance, if it is caused by ulcerative colitis, then treatment should focus on this condition. In the case of primary lactose intolerance, a lifelong avoidance of lactose-containing foods is necessary. (Medication use should be under the guidance of a physician.)