Detailed medication instructions for patients with the antiviral drug Valganciclovir

1. Indications

Valganciclovir (Valganciclovir) is mainly used to treat the following diseases:

1.1 Cytomegalovirus (CMV) infection, including CMVretinitis, CMVpneumonia, etc.;

1.2 Prevention of CMV infection after organ transplantation.

2. Mechanism of action

Valganciclovir (valganciclovir) is the prodrug of ganciclovir. Once it enters the body, it is metabolized by the liver and converted into the active ingredient ganciclovir. Ganciclovir inhibitsCMV DNA polymerase and prevents the extension of virusDNA chains, thereby effectively inhibiting the replication and spread of CMV.

3. Pharmacology

After oral administration of Valganciclovir , it is metabolized by the liver and converted into the active ingredient ganciclovir. Ganciclovir competitively binds to the viral DNA polymerase to inhibit the synthesis of viral DNA, thereby blocking the replication and spread of CMV. Ganciclovir is mainly excreted through the kidneys, with approximately 60%-70% being excreted in the urine in unmetabolized form.

4. Dosage and Usage

4.1Adult patients

4.1.1 TreatmentCMVRetinitis: Starting dose900mg per time, 2 times, taken continuously for 21 days; the maintenance dose is 900 mg per time, 1 time per day.

4.1.2 Prevention of CMV disease in heart and kidney-pancreas transplantation: 900mg each time, daily1 time, starting from 10 days after transplantation, until 100 days after transplantation.

4.1.3 Prevention of CMV disease in kidney transplantation: 900mg each time, daily1times, starting from 10 days after transplantation to 200 days after transplantation.

4.2 Pediatric patients

4.2.1 Prevention of high-risk childrenCMV disease (kidney transplantation): 1 times a day, the dose is calculated based on the child's body surface area and creatinine clearance, starting within 10 days after transplantation and continuing until 200 days after transplantation.

4.2.2 Prevention of high-risk childrenCMV disease (heart transplantation): 1 times a day, the dose is calculated based on the child's body surface area and creatinine clearance, starting within 10 days after transplantation and ending 100 days after transplantation.

5. Side effects

Valganciclovir Possible side effects include:

5.1 Myelosuppression (leukopenia, anemia, thrombocytopenia)

5.2 Gastrointestinal discomfort (nausea, vomiting, diarrhea)

5.3 Nervous system reactions (headache, dizziness)

5.4 Renal function impairment

5.5 Fatigue, dizziness, rash, abnormal liver function, etc.

6. Warnings and Precautions

6.1 Patients should undergo routine blood tests, liver function tests and renal function monitoring regularly during medication.

6.2 Pregnant and lactating women should use with caution and under the guidance of a doctor.

6.3 Patients should avoid concurrent use with other drugs to avoid increasing the risk of drug interactions.

7. Contraindications

It is contraindicated if you are allergic to Valganciclovir or its ingredients.

8. Drug interactions

Valganciclovir may interact with other drugs such as cetuximab, antifungal drugs, etc. and should be used with caution under the guidance of a doctor.

9. Drug use for special groups

For patients with impaired renal function, the dose should be adjusted according to renal function to avoid drug accumulation leading to adverse reactions.

10. Price and purchasing channels

Vansevir (valganciclovir) is currently on the market in China, but it has not yet been included in medical insurance. Patients can buy it domestically, but the price is relatively high, about more than 10,000 yuan. For specific prices, please consult the local hospital pharmacy. The cheaper ones abroad are the Indian and Turkish versions of the original drugs, which cost around three to four thousand yuan and have the same therapeutic ingredients as the domestic original drugs.

The above is the detailed medication instructions for Vancevir (valganciclovir) for patients. Patients should read it carefully and follow the doctor's instructions before use. If you have any discomfort or questions, you should consult your doctor promptly.