Quiz: Name two approved antiviral regimens that include either two purine nukes or two pyrimidine nukes.
Combivir (fixed dose combination of two pyrimidine nukes lamivudine and zidovudine) and Trizivir (same + abacavir - a purine analog). Don't know if it qualifies as the two pyrimidine analogs are the same ones but the regimen is different.