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Predicting drug?drug interactions between ainuovirine and rifampicin plus isoniazid using PBPK modelling (Virtual) - Oct 26, 2024 - Abstract #HIVGlasgow2024HIV_Glasgow_342; The developed PBPK model characterized the opposite effect-mediated DDIs between RFP and INH on metabolisms of ANV, accurately predicting a narrowed therapeutic window when ANV 150 mg daily was co-administered with RFP plus INH. A change in ANV dosing regimen from 150 to 225 mg was predicted to mitigate the effect of the DDIs on the Cmax and Ctrough of ANV, maintaining plasma concentration levels above the therapeutic threshold but well below the safety margin.
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Effect of fluconazole on the pharmacokinetics of ainuovirine in healthy adults (Virtual) - Oct 26, 2024 - Abstract #HIVGlasgow2024HIV_Glasgow_339; Co-administration of ainuovirine with fluconazole significantly increased ainuovirine systemic exposure, whereas ainuovirine did not appear to affect fluconazole exposure. Therefore, it is recommended that the ainuovirine dose be halved (i.e. 75 mg) when co-administered with strong CYP2C19 inhibitors, including fluconazole.
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