The effect of SMS follow-up on drug compliance and efficacy in patients with FGIDs has not been reported in the literature. We, therefore, conducted a prospective randomized controlled trial to investigate whether SMS follow-up could improve treatment adherence in patients with FGIDs, which in turn would help symptom relief and improve treatment outcomes.

The irritable bowel syndrome (IBS) and other functional gastrointestinal disorders (FGIDs) are common and pose significant burdens to patients. Although regular medications have substantial benefits for disease remission, many patients do not follow the recommendations of standard medication regimens given by physicians at the time of the visit, so how to improve patient compliance becomes even more important. Many factors can affect drug compliance. Forgetting seems to be one of the important reasons for poor compliance. In order to solve this problem, many studies such as drug charts/calendars, mini kits, etc. have been conducted in previous studies. At present, with the popularization of mobile phones, SMS-based interventions are gradually being applied to various medical environments. Compared with the phone, SMS consumes less time and can be easily integrated into the patient's daily life. Therefore, short messages may be more suitable for follow-up of patients outside hospital.

Inclusion Criteria:

• Patients with newly diagnosed FGIDs according to Rome-IV
• Aged 18-70 years
• With no obvious organic abnormalities

Exclusion Criteria:

• With organic gastrointestinal diseases
• With psychiatric diseases or are taking psychotropic agents
• With severe cardiopulmonary or other organ diseases
• Pregnant women