Emtricitabin fosforyleres af celleenzymer til at danne emtricitabin 5 '- trifosfat, som kompetitivt hæmmer HIV- 1 reverse transkriptase, som resulterer i DNA- kædeterminering.
Emtricitabine is phosphorylated by cellular enzymes to form emtricitabine 5'-triphosphate, which competitively inhibits HIV-1 reverse transcriptase, resulting in DNA chain termination.