Pharmacology The basis of combining ritonavir with lopinavir: A Pharmaceutical compatibility B C4P3A4 inhibition by ritonavir C Long elimination half life of ritonavir D Ability to counteract side-effects of lopinavir 💡 Explanation The basis of combining ritonavir with lopinavir: ✓ Correct Answer: B. C4P3A4 inhibition by ritonavir