Xinlikang Capsule for Chemotherapy-induced Fatigue and Immune Disorders in Diffuse Large B Lymphoma

This study is testing whether a traditional Chinese herbal medicine capsule called Xinlikang can reduce fatigue and immune problems in people who have completed treatment for a type of blood cancer called diffuse large B-cell lymphoma (DLBCL) and are in complete remission. **You may be eligible if...** - You are 18 or older - You have been diagnosed with diffuse large B-cell lymphoma (DLBCL) - You have completed your full course of chemotherapy and immunotherapy and your cancer is in complete remission, confirmed by PET/CT scan - You finished chemotherapy 30 to 90 days ago - You are experiencing moderate to severe fatigue (score of 4 or more on the BFI scale) - You do not plan to start other cancer treatments in the next 3 months **You may NOT be eligible if...** - Your cancer has not achieved complete remission - You are currently using other Chinese herbal treatments or immunosuppressive agents - You have major surgery planned in the next 3 months - Your liver or kidney function is significantly impaired Talk to your doctor to see if this trial is right for you.