Answer
Ritonavir may reduce the effectiveness of combined hormonal contraception. Use an effective alternative or additional barrier method for the period specified in the product information.
Sources for this answer
- Paxlovid 150 mg/100 mg film-coated tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.