In our recent article on the combination of vanzacaftor, tezacaftor, and deutivacaftor (Alyftrek) for cystic fibrosis (Med Lett Drugs Ther 2025; 67:41), Table 3 misstated the formulations and dosage of the combination of elexacaftor, tezacaftor, and ivacaftor (Trikafta).

The FDA has approved Alyftrek (Vertex), an oral fixed-dose combination of the cystic fibrosis transmembrane conductance regulator (CFTR) modulators vanzacaftor, tezacaftor, and deutivacaftor, for once-daily treatment of cystic fibrosis (CF) in patients ≥6 years old who have at least one F508del mutation or another responsive mutation in the CFTR gene. This is the first approval for vanzacaftor and for deutivacaftor, a deuterated form of ivacaftor. Trikafta, a twice-daily oral fixed-dose combination of elexacaftor, tezacaftor, and ivacaftor, is FDA-approved for the same indication in patients ≥2 years old.

The FDA has approved Trikafta (Vertex), a fixed-dose combination of the cystic fibrosis transmembrane conductance regulator (CFTR) modulators elexacaftor, tezacaftor, and ivacaftor, for oral treatment of cystic fibrosis (CF) in patients ≥12 years old who have at least one Phe508del mutation in the CFTR gene. About 90% of patients with CF have at least one copy of the Phe508del (also called F508del) mutation. This is the first approval for elexacaftor. Ivacaftor is available alone (Kalydeco) and in 2-drug combinations with tezacaftor (Symdeco) and lumacaftor (Orkambi).