Plasmakoncentrationen af atazanavir kan falde hvis det gastriske pH øges ved samtidig administration af antacida, inklusive lægemidler med buffere, og REYATAZ/ ritonavir.
Reduced plasma concentrations of atazanavir may be the consequence of increased gastric pH if antacids, including buffered medicinal products, are administered with REYATAZ/ ritonavir.