For research use only.
Catalog No.S1185 Synonyms: A 84538, RTV, Norvir, Norvir Softgel
CAS No. 155213-67-5
Ritonavir (ABT-538, A 84538, RTV, Norvir, Norvir Softgel) is a Cytochrome P450 3A and Protease Inhibitor; Also inhibits Cytochrome P450 2D6, P-Glycoprotein and induces Cytochrome P450 2C19, Cytochrome P450 1A2, Cytochrome P450 2C9, Cytochrome P450 2B6 and UDP Glucuronosyltransferases. Ritonavir induces apoptosis.
Selleck's Ritonavir (ABT-538) has been cited by 26 publications
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|Description||Ritonavir (ABT-538, A 84538, RTV, Norvir, Norvir Softgel) is a Cytochrome P450 3A and Protease Inhibitor; Also inhibits Cytochrome P450 2D6, P-Glycoprotein and induces Cytochrome P450 2C19, Cytochrome P450 1A2, Cytochrome P450 2C9, Cytochrome P450 2B6 and UDP Glucuronosyltransferases. Ritonavir induces apoptosis.|
Ritonavir is a very potent inhibitor of CYP3A4 mediated testosterone 6β-hydroxylation with mean Ki of 19 nM and also inhibits tolbutamide hydroxylation with IC50 of 4.2 μM.  Ritonavir is found to be a potent inhibitor of CYP3A-mediated biotransformations (nifedipine oxidation with IC50 of 0.07 mM, 17alpha-ethynylestradiol 2-hydroxylation with IC50 of 2 mM; terfenadine hydroxylation with IC50 of 0.14 mM). Ritonavir is also found to be an inhibitor of the reactions mediated by CYP2D6 (IC50 = 2.5 mM) and CYP2C9/10 (IC50 = 8.0 mM).  Ritonavir results in an increase in cell viability in uninfected human PBMC cultures. Ritonavir markedly decreases the susceptibility of PBMCs to apoptosis correlated with lower levels of caspase-1 expression, decreases in annexin V staining, and reduces caspase-3 activity in uninfected human PBMC cultures. Ritonavir inhibits induction of tumor necrosis factor (TNF) production by PBMCs and monocytes in a time- and dose-dependent manner at nontoxic concentrations.  Ritonavir inhibits p-glycoprotein-mediated extrusion of saquinavir with an IC50 of 0.2 μM, indicating a high affinity of ritonavir for p-glycoprotein.  Ritonavir inhibits human liver microsomal metabolism of ABT-378 potently with Ki of 13 nM. Ritonavir combined with ABT-378 (at 3:1 and 29:1 ratios) inhibits CYP3A (IC50 = 1.1 and 4.6 μM), albeit less potently than Ritonavir (IC50 = 0.14 μM). 
-  Eagling VA, et al. Br J Clin Pharmacol, 1997, 44(2), 190-194.
-  Kumar GN, et al. J Pharmacol Exp Ther, 1996, 277(1), 423-431.
-  Weichold FF, et al. J Hum Virol, 1999, 2(5), 261-269.
|In vitro||DMSO||100 mg/mL (138.7 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
30% PEG400+0.5% Tween80+5% propylene glycol
For best results, use promptly after mixing.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
|Synonyms||A 84538, RTV, Norvir, Norvir Softgel|
In vivo Formulation Calculator (Clear solution)
|Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)|
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|% DMSO % % Tween 80 % ddH2O|
Working concentration： mg/ml；
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT04960202||Recruiting||Drug: PF-07321332|Drug: Ritonavir|Drug: Placebo||COVID-19||Pfizer||July 16 2021||Phase 3|
|NCT04962022||Recruiting||Drug: PF-07321332/ritonavir|Drug: Itraconazole||Healthy Participant||Pfizer||July 20 2021||Phase 1|
|NCT04121195||Recruiting||Drug: Dose escalation||HIV/AIDS|Tuberculosis||University of Liverpool|European and Developing Countries Clinical Trials Partnership (EDCTP)|Joint Clinical Research Centre Kampala Uganda|University of Cape Town Cape Town South Africa|Infectious Diseases Institute Makerere University College of Health Sciences Kampala Uganda|University of Turin Turin Italy||October 30 2020||Phase 2|Phase 3|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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