KALYDECO (ivacaftor)

The pharmacokinetics of ivacaftor is similar between healthy adult volunteers and patients with CF. After oral administration of a single 150 mg dose to healthy volunteers in a fed state, peak plasma concentrations (T max ) occurred at approximately 4 hours, and the mean (±SD) for AUC and C max were 10600 (5260) ng*hr/mL and 768 (233) ng/mL, respectively. After every 12-hour dosing, steady-state plasma concentrations of ivacaftor were reached by days 3 to 5, with an accumulation ratio ranging fr...

14.1 Trials in Patients with CF who have a G551D Mutation in the CFTR Gene Dose Ranging: Dose ranging for the clinical program consisted primarily of one double-blind, placebo-controlled, crossover trial in 39 adult (mean age 31 years) Caucasian patients with CF who had FEV 1 ≥40% predicted. Twenty patients with median predicted FEV 1 at baseline of 56% (range: 42% to 109%) received KALYDECO 25, 75, 150 mg, or placebo every 12 hours for 14 days and 19 patients with median predicted FEV 1 at baseline of 69% (range: 40% to 122%) received KALYDECO 150, 250 mg, or placebo every 12 hours for 28 day...

The following adverse reactions are discussed in greater detail in other sections of the labeling: Transaminase Elevations [see Warnings and Precautions (5.1) ] Hypersensitivity Reactions, Including Anaphylaxis [see Warnings and Precautions (5.2) ] Intracranial Hypertension [see Warnings and Precautions (5.3) ] Cataracts [see Warnings and Precautions (5.5) ] The most common adverse drug reactions to KALYDECO (≥8% of patients with CF who have a G551D mutation in the CFTR gene) were headache, oro...

None. None ( 4 )

Elevated transaminases (ALT or AST): Transaminases (ALT and AST) should be assessed prior to initiating KALYDECO, every 3 months during the first year of treatment, and annually thereafter. In patients with a history of transaminase elevations, more frequent monitoring of liver function tests should be considered. Patients who develop increased transaminase levels should be closely monitored until the abnormalities resolve. Interrupt dosing in patients with ALT or AST of greater than 5 times the...

7 DRUG INTERACTIONS Potential for other drugs to affect ivacaftor CYP3A inhibitors: Reduce KALYDECO dosage in patients aged 6 months and older when co-administered with strong CYP3A inhibitors (e.g., ketoconazole) or moderate CYP3A inhibitors (e.g., fluconazole). KALYDECO is not recommended in patients aged 1 month to less than 6 months when co-administered with strong or moderate CYP3A inhibitors...