Fosamprenavir Calcium + Esomeprazole Interaction

Description

Proton pump inhibitors: Esomeprazole , lansoprazole, omeprazole, pantoprazole, rabeprazole Fosamprenavir: ↔ Amprenavir ↑ Esomeprazole Fosamprenavir/ ritonavir: ↔ Amprenavir ↔ Esomeprazole Proton pump inhibitors can be administered at the same time as a dose of fosamprenavir with no change in plasma amprenavir concentrations. n % Change in Amprenavir Pharmacokinetic Parameters (90% CI) C max AUC C min Antacid (MAALOX TC) 30-mL single dose 1,400-mg single dose 30 ↓35 (↓24 to ↓42) ↓18 (↓9 to ↓26) ↑14 (↓7 to ↑39) Atazanavir 300 mg once daily for 10 days 700 mg twice daily plus ritonavir 100 mg twice daily for 10 days 22 ↔ ↔ ↔ Atorvastatin 10 mg once daily for 4 days 1,400 mg twice daily for 2 weeks 16 ↓18 (↓34 to ↑1) ↓27 (↓41 to ↓12) ↓12 (↓27 to ↓6) Atorvastatin 10 mg once daily for 4 days 700 mg twice daily plus ritonavir 100 mg twice daily for 2 weeks 16 ↔ ↔ ↔ Efavirenz 600 mg once daily for 2 weeks 1,400 mg once daily plus ritonavir 200 mg once daily for 2 weeks 16 ↔ ↓13 (↓30 to ↑7) ↓36 (↓8 to ↓56) Efavirenz 600 mg once daily plus additional ritonavir 100 mg once daily for 2 weeks 1,400 mg once daily plus ritonavir 200 mg once daily for 2 weeks 16 ↑18 (↑1 to ↑38) ↑11 (0 to ↑24) ↔ Efavirenz 600 mg once daily for 2 weeks 700 mg twice daily plus ritonavir 100 mg twice daily for 2 weeks 16 ↔ ↔ ↓17 (↓4 to ↓29) Esomeprazole 20 mg once daily for 2 weeks 1,400 mg twice daily for 2 weeks 25 ↔ ↔ ↔ Esomeprazole 20 mg once daily for 2 weeks 700 mg twice daily plus ritonavir 100 mg twice daily for 2 weeks 23 ↔ ↔ ↔ Ethinyl estradiol/ norethindrone 0.035 mg/0.5 mg once daily for 21 days 700 mg twice daily plus ritonavir Ritonavir C max , AUC, and C min increased by 63%, 45%, and 13%, respectively, compared with historical control. 700 mg twice daily plus ritonavir 100 mg twice daily for 10 days 21 ↓24 (↓39 to ↓6) ↓22 (↓34 to ↓9) ↔ Atorvastatin 10 mg once daily for 4 days 1,400 mg twice daily for 2 weeks 16 ↑304 (↑205 to ↑437) ↑130 (↑100 to ↑164) ↓10 (↓27 to ↑12) Atorvastatin 10 mg once daily for 4 days 700 mg twice daily plus ritonavir 100 mg twice daily for 2 weeks 16 ↑184 (↑126 to ↑257) ↑153 (↑115 to ↑199) ↑73 (↑45 to ↑108) Esomeprazole 20 mg once daily for 2 weeks 1,400 mg twice daily for 2 weeks 25 ↔ ↑55 (↑39 to ↑73) ND Esomeprazole 20 mg once daily for 2 weeks 700 mg twice daily plus ritonavir 100 mg twice daily for 2 weeks 23 ↔ ↔ ND Ethinyl estradiol Administered as a combination oral contraceptive tablet: ethinyl estradiol 0.035 mg/norethindrone 0.5 mg.