I kliniske studier med abacavir 600 mg én gang daglig forblev den rapporterede hyppighed af overfølsomhed indenfor det range der er registreret for abacavir 300 mg to gange daglig.
In clinical studies with abacavir 600 mg once daily the reported rate of hypersensitivity remained within the range recorded for abacavir 300 mg twice daily.