https://interactions.guidetherapeutiquevih.com/en/interaction-details?id=10215

Atazanavir / ritonavir

Atorvastatin

Dosage adjustment may be necessary.

No pharmaceutical opinion available for this interaction.

Mechanism

Atazanavir / ritonavir may possibly inhibit the metabolism (CYP 3A4) and consequently increase the plasma concentration of Atorvastatin.

Atazanavir / ritonavir

Pharmacodynamic effects

–

Recommendations

–

Alternative solution(s)

–

Atorvastatin

Pharmacodynamic effects

Possible increased risk of HMG CoA inhibitor toxicity.

Recommendations

Start therapy with a 10 mg dose once daily, and increase with caution depending on patient clinical response and tolerance.

In patients already under treatment, a reduction in dosage may be necessary.

We do not recommend more than 20 mg per day (U.S. guidelines) and 40 mg per day (European guidelines).

Or choose an alternative.

Alternative solution(s)

Pravastatin or ezetimibe.

Monitor

Symptoms of toxicity associated with hypolipidemic agents : gastrointestinal effects, fatigue and muscular weaknesses, myalgias, muscular cramps, myopathies, rhabdomyolysis and myoglobinuria leading to renal insufficiency.

Tests

AST

ALT

CK

Lipidic profile

Pharmacokinetic parameters

–

Comment

We observe an increase in AUC of atorvastatin with lopinavir/ritonavir, saquinavir/ritonavir, darunavir/ritonavir, tipranavir/ritonavir, fosamprenavir/ritonavir and nelfinavir.

Ref #1695: Case report of drug-induced rhabdomyolysis in a 34-year-old HIV-infected male with a history of liver disease and concomitant use of clarithromycin, atorvastatin, and lopinavir/ritonavir.

Comment
Reference
  • 2211
    Burger D, Stroes E, Reiss P et al. Drug interactions between statins and antiretroviral agents. Current opinion in HIV and AIDS 2008;3:247-251.
  • 2212
    Neuvonen PJ, Niem M and Backman JT. Drug interaction with lipid-lowering drugs: mecanisms and clinical relevance. Clin Pharmacol Ther 2006;80:565-581
  • 2613
    Atazanavir (Reyataz), Bristol-Myers Squibb, Quebec, Canada, 26 octobre 2018.
  • 2790
    Atorvastatin (Lipitor), Pfizer, Quebec, Canada, 20 mars 2017.
  • 2787
    Jacobson TA. Comparative Pharmacokinetic Interaction Profiles of Pravastatin, Simvastatin and Atorvastatin When Coadministered Whit Cytochrome P450 Inhibitors. Am J Cardiol 2004; 94 : 1140-1146.
  • 2789
    Lennernas H. Clinical Pharmacokinetics of Atorvastatin. Clin Pharmacokinet 2003; 42 : 1141-1160.
  • 2983
    Chauvin B, Drouot S, Barrail-Tran A and Taburet AM. Drug-Drug Interactions between HMG-coA reductase inhibitors (Statins) and Antiretroviral Protease Inhibitors. Clin Pharmacokinet 2013; 52: 815-831.
  • 1695
    Mah Ming JB and Gill MJ. Drug-Induced Rhabdomyolysis after Concomitant Use of Clarithromycin, Atorvastatin, and Lopinavir/Ritonavir in a Patient with HIV. AIDS Patient Care and STDs 2003;17;207-210.