The side effects of entecavir dispersible tablets are relatively few, but the following side effects are common: 1. sleep disorders, some patients may experience sleep disorders such as insomnia or difficulty sleeping after taking it. 2. gastrointestinal symptoms such as abdominal distension, nausea and vomiting may occur. 3. some patients may develop hyperlactatemia after long-term use. 4. a small number of patients may develop renal function abnormalities after long-term use, manifested as increased creatinine and decreased glomerular filtration. 5. a small number of patients may develop neurological manifestations such as dizziness, headache and drowsiness. 6. some patients may develop allergies such as rash. 7. A small number of patients may experience neurological manifestations such as dizziness, headache, drowsiness, etc. Some patients may experience allergies such as rashes. 7. A very small number of patients may experience hair loss.