As a compound antiviral drug, Vosevi's side effects mainly involve abnormalities in the digestive system, nervous system, and laboratory indicators. Most symptoms can be alleviated by adjusting the medication method or symptomatic treatment. The following is a systematic explanation of the common side effects classification and specific countermeasures of the drug.

1. Common side effects and mitigation measures

(1) Headache: It is recommended to drink water in portions to supplement electrolytes, and if necessary, take acetaminophen to avoid using NSAIDs that can increase the burden on the liver.

(2) Fatigue: Maintain a regular daily routine, and it is recommended to schedule medication at night to reduce daytime sleepiness and avoid driving or precision operations.

(3) Nausea and vomiting: Taking with meals can alleviate symptoms, with small and multiple meals being appropriate. In severe cases, antiemetic drugs such as ondansetron can be considered.

2. Adverse reactions to the digestive system

(1) Diarrhea: Supplement water and electrolytes, avoid high-fat diet, and use adsorbents such as montmorillonite powder appropriately.

(2) Decreased appetite: Choose high protein, high calorie small meals and seek nutritional advice if necessary.

(3) Elevated transaminase: Monitor liver function monthly during treatment to avoid the use of liver toxic drugs such as acetaminophen.

3. Serious side effects requiring medical intervention

(1) Bradycardia: When combined with amiodarone, electrocardiographic monitoring is required. If dizziness/fainting occurs, seek medical attention immediately.

(2) Acute pancreatitis: Sudden severe abdominal pain accompanied by vomiting requires emergency screening, immediate discontinuation of medication and intravenous fluid replacement.

(3) Severe rash: Premature symptoms of Stevens Johnson syndrome (mucosal ulceration, fever) require permanent discontinuation of medication.

4. Laboratory monitoring recommendations

(1) Baseline examination: Liver function, kidney function, HCV RNA quantification, and HIV co infection screening must be completed before treatment.

(2) Routine monitoring: ALT/AST testing is conducted every 4 weeks, and creatinine monitoring frequency is increased for individuals with renal dysfunction.

(3) Special population: Patients with cirrhosis need to monitor INR every 2 weeks, and Child Pugh B/C grade should be used with caution.