A Self-Controlled Study on the Treatment of Restless Legs Syndrome in Uremia With Dipyridamole

This study is a self-controlled study in which all participants received active drug treatment for 6 months. The efficacy and safety of dipyridamole were evaluated by comparing changes in relevant scale scores before and after treatment. The study screened patients receiving maintenance hemodialysis at the Hemodialysis Center of the First Affiliated Hospital of Chongqing Medical University, with a baseline score of greater than 15 on the International Restless Legs Syndrome Rating Scale (IRLS). Approximately 80 patients met the inclusion criteria of the study and were willing to sign informed consent. General clinical data and pre-study laboratory parameters were collected, including age, sex, body mass index, serum iron, ferritin, serum parathyroid hormone, hemoglobin, albumin, dialysis adequacy, IRLS, Pittsburgh Sleep Quality Index, Hamilton Depression Rating Scale, Hamilton Anxiety Rating Scale, and KDQOLTM-36. All enrolled patients were instructed to take dipyridamole tablets orally at a dose of 50 mg three times daily for 12 weeks. During the study, the occurrence of drug-related adverse reactions such as nausea, headache, dizziness, diarrhea, insomnia, fatigue, and bleeding was also recorded. At the end of the treatment period, general clinical data, laboratory parameters, and relevant scale assessment results were collected again.

• Dipyridamole 50mg tid (Drug): Participants will take dipyridamole daily (50mg each time, three times a day) for 12 weeks

Primary outcomes

• International Restless Legs Syndrome Study Group rating scale [From enrollment to the end of treatment at 12 weeks]: The treatment effect on participants' restless legs syndrome is mainly assessed through their scores on the International Restless Legs Syndrome Study Group rating scale before and after treatment.

Secondary outcomes

• Hamilton Depression Rating Scale [From enrollment to the end of treatment at 12 weeks]: The changes in participants' depressive symptoms were assessed using the Hamilton Depression Rating Scale before and after they received treatment.
• Hamilton Anxiety Scale [From enrollment to the end of treatment at 12 weeks]: The changes in participants' anxiety levels were assessed using the Hamilton Anxiety Scale before and after they received treatment.
• Pittsburgh Sleep Quality Index [From enrollment to the end of treatment at 12 weeks]: The changes in participants' sleep quality were assessed using the Pittsburgh Sleep Quality Index before and after they received treatment.
• KDQOL-36 Scale [From enrollment to the end of treatment at 12 weeks]: Changes in participants' quality of life were assessed using the KDQOL-36 Scale before and after they received treatment.

Sex: All, ages: 18 Years to 75 Years

Inclusion Criteria:

(1) Maintenance hemodialysis for ≥3 months;(2) Age between 18-75 years;(3) Diagnosed with Restless Legs Syndrome (RLS) according to IRLSSG standards with a score >15;(4) Willing to cooperate with this study.

Exclusion Criteria:

(1). Patients with other cerebrovascular, muscular, and movement system diseases affecting the assessment of RLS;(2). Patients with active bleeding, such as gastrointestinal bleeding or intracerebral hemorrhage;(3). Patients who have been on dipyridamole for a long time;(4). Patients who have taken other medications that may affect RLS in the last 3 weeks, such as dopamine agonists/antagonists, tricyclic antidepressants, lithium, etc.;(5). Patients with a history of psychosis;(6). Pregnant or breastfeeding women;(7). Patients who are allergic or intolerant to dipyridamole;(8). Patients who cannot or are unwilling to cooperate with this study.