Bictegravir/FTC/TAF: new once-daily integrase-based FDC submitted to US FDA

Simon Collins, HIV i-Base

On 12 June 2017, Gilead Sciences submitted a new drug application to the US FDA for a single tablet fixed-dose combination (FDC) of bictegravir/emtricitabine/tenofovir alafenamide (BIC/FTC/TAF).

Bictegravir (formerly GS-9883) is a once-daily integrase inhibitor, with mean plasma concentration more than 20 x above the IC95 at 24 hours and low intrapatient differences. It is used at low milligram dose (50 mg) leading to a small pill with TAF. Bictegravir has a plasma half-life of 18 hours, doesn’t need PK boosting and can be taken with or without food.

Potential drug-drug interactions that affect bictegravir are likely to be dependent on inhibition or induction of both CYP3A4 and UGT1-A1 with little expected effect of bictegravir on other drugs.

The application is based on non-inferiority results from four phase 3 studies. These include a treatment naive study compared to dolutegravir and several switch studies in people with viral suppression on current treatment.

A similar submission to the European Medicines Agency (EMA) is planned duringĀ 3Q 2017.


Gilead press statement. Gilead submits new drug application to U.S. food and drug administration for fixed-dose combination of bictegravir, emtricitabine and tenofovir alafenamide for HIV treatment. (12 June 2017).

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