Lansoprazole can not be generalized, according to the condition of the decision, specific should follow the doctor’s instructions. Lansoprazole is available in tablets and capsules. The duration of lansoprazole use needs to be determined by the disease being treated, the effect of the treatment, the degree of tolerance to the drug and other factors, which varies from person to person. The instruction manual points out that duodenal ulcers need to be taken for 4 to 6 weeks; reflux esophagitis, gastric ulcers, Droege-Ayer syndrome need to be taken for 6 to 8 weeks. The specific need to follow the doctor’s instructions for the use of drugs. Lansoprazole adverse reactions include rash, itching, leukopenia, anemia, thrombocytopenia, constipation, thirst, abdominal distension, diarrhea and so on. The drug is contraindicated in people who are allergic to it.