I studie CAL30001, blev 182 tidligere behandlede patienter med virologisk svigt randomiseret og de modtog enten fastdosiskombinationen (FDC) af abacavir/ lamivudin én gang daglig, eller abacavir 300 mg to gange daglig plus lamivudin 300 mg én gang daglig, begge i kombination med tenofovir og en PI eller en NNRTI i 48 uger.
In study CAL30001, 182 treatment-experienced patients with virologic failure were randomised and received treatment with either the fixed-dose combination of abacavir/ lamivudine (FDC) once daily or abacavir 300 mg twice daily plus lamivudine 300 mg once daily, both in combination with tenofovir and a PI or an NNRTI for 48 weeks.