Deutivacaftor

Vanzacaftor and tezacaftor bind to different sites on the CFTR protein and have an additive effect in facilitating the cellular processing and trafficking of select mutant forms of CFTR (including F508del- CFTR) to increase the amount of CFTR protein delivered to the cell surface compared to either molecule alone. Deutivacaftor potentiates the channel open probability (or gating) of the CFTR protein at the cell surface.

• ALYFTREK is indicated for the treatment of cystic fibrosis (CF) in adult and pediatric patients 6 years of age and older who have a clinical diagnosis of CF and who have at least one variant in the cystic fibrosis transmembrane conductance regulator ( CFTR ) gene that is either responsive based on clinical and/or in vitro data (see Table 5 ) or results in production of CFTR protein [see Clinical Pharmacology (12.1) ]. If the patient's genotype is unknown, an FDA-cleared CF genetic test should be used to confirm the presence of at least one variant in the CFTR gene that is either responsive based on clinical and/or in vitro data or results in production of CFTR protein.

• None. None.contraindicated

Prior to initiating ALYFTREK obtain liver function tests (ALT, AST, alkaline phosphatase, and bilirubin) in all patients. Monitor liver function tests every month during the first 6 months of treatment, then every 3 months during the next 12 months, then at least annually thereafter. ( 2.1 , 5.1 ) Recommended Dosage for Adult and Pediatric Patients Aged 6 Years and Older (with fat-containing food) ( 2.2 ) Age Weight Once Daily Oral Dosage 6 to less than 12 years old Less than 40 kg Three tablets of vanzacaftor 4 mg/tezacaftor 20 mg/deutivacaftor 50 mg Greater than or equal to 40 kg Two tablets of vanzacaftor 10 mg/tezacaftor 50 mg/deutivacaftor 125 mg 12 years and older Any Weight Two tablets of vanzacaftor 10 mg/tezacaftor 50 mg/deutivacaftor 125 mg Should not be used in patients with severe hepatic impairment. Use not recommended in patients with moderate hepatic impairment unless the benefit outweighs the risk. If used, no dose adjustment is recommended. Liver function tests should be closely monitored. ( 2.4 , 5.1 , 6.1 , 8.7 ) See full prescribing information for dosage modifications for concomitant use of ALYFTREK with strong or moderate CYP3A inhibitors. ( 2.3 , 5.7 , 7.1 ) 2.1 Recommended Laboratory Testing Prior to ALYFTREK Initiation and During Treatment Prior to initiating ALYFTREK, obtain liver function tests (ALT, AST, alkaline phosphatase, and bilirubin) for all patients. Monitor liver function tests every month during the first 6 months of treatment, then every 3 months for the next 12 months, then at least annually thereafter.

Drug-Induced Liver Injury and Liver Failure : Elevated transaminases have been observed in patients treated with ALYFTREK. Cases of serious and potentially fatal drug-induced liver injury and liver failure have been reported with a drug that contains the same or similar active ingredients as ALYFTREK. Assess liver function tests (ALT, AST, alkaline phosphatase, and bilirubin) in all patients prior to initiating and throughout treatment with ALYFTREK. Interrupt ALYFTREK in the event of significant elevations in liver function tests or signs or symptoms of liver injury. ALYFTREK should not be used in patients with severe hepatic impairment (Child-Pugh Class C). ALYFTREK is not recommended in patients with moderate hepatic impairment (Child-Pugh Class B). ( 2.4 , 5.1 , 8.7 ) Hypersensitivity Reactions : Hypersensitivity reactions, including anaphylaxis, have been reported in the postmarketing setting for drugs containing elexacaftor, tezacaftor, and/or ivacaftor. If signs or symptoms of serious hypersensitivity reactions develop during ALYFTREK treatment, discontinue ALYFTREK and initiate appropriate therapy. ( 5.2 ) Patients Who Discontinued or Interrupted Elexacaftor-, Tezacaftor-, or Ivacaftor-Containing Drugs Due to Adverse Reactions : Consider benefits and risks before using ALYFTREK in patients who discontinued or interrupted elexacaftor-, tezacaftor-, or ivacaftor-containing drugs due to adverse reactions. If ALYFTREK is used, closely monitor for adverse reactions as clinically appropriate.

The following clinically significant adverse reactions are discussed in greater detail in other sections of the labeling: Drug-Induced Liver Injury and Liver Failure [see Warnings and Precautions (5.1) ] Hypersensitivity Reactions, Including Anaphylaxis [see Warnings and Precautions (5.2) ] Patients Who Discontinued or Interrupted Elexacaftor-, Tezacaftor-, or Ivacaftor-Containing Drugs Due to Adverse Reactions [see Warnings and Precautions (5.3) ] Intracranial Hypertension [see Warnings and Precautions (5.4) ] Neuropsychiatric Events, Including Suicidal Thoughts and Behaviors [see Warnings and Precautions (5.5) ] Cataracts [see Warnings and Precautions (5.8) ] Most common adverse reactions to ALYFTREK (≥5% of patients and at a frequency higher than ELX/TEZ/IVA by ≥1%) were cough, nasopharyngitis, upper respiratory tract infection, headache, oropharyngeal pain, influenza, fatigue, increased ALT, rash, increased AST, and sinus congestion. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Vertex Pharmaceuticals Incorporated at 1-877-634-8789 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.

8.1 Pregnancy Risk Summary There are no available data on ALYFTREK use in pregnant women to evaluate for a drug-associated risk of major birth defects, miscarriage, or other adverse maternal or fetal outcomes. Although there are no animal reproduction studies with the concomitant administration of vanzacaftor, tezacaftor, and deutivacaftor, separate reproductive and developmental studies were conducted with vanzacaftor and tezacaftor in pregnant rats and rabbits. Deutivacaftor is a deuterated isotopologue of ivacaftor with a toxicity profile similar to ivacaftor. Reproductive and development studies were conducted with ivacaftor in pregnant rats and rabbits. In animal embryo fetal development (EFD) studies, oral administration of vanzacaftor to pregnant rats and rabbits during organogenesis demonstrated no adverse developmental effects at doses that produced maternal exposures up to approximately 30 times the exposure at the maximum recommended human dose (MRHD) in rats and 22 times the MRHD in rabbits. Oral administration of tezacaftor to pregnant rats and rabbits during organogenesis demonstrated no adverse developmental effects at doses that produced maternal exposures up to approximately 3 times the exposure at the MRHD in rats and 0.2 times the MRHD in rabbits (based on summed AUCs of tezacaftor and the metabolite M1-TEZ).

Metabolism

The pharmacokinetic parameters for vanzacaftor, tezacaftor, and deutivacaftor in patients with CF aged 12 years and older are provided in Table 6 as mean (SD) unless otherwise specified. No clinically significant differences in the pharmacokinetics of vanzacaftor, tezacaftor, and deutivacaftor were observed between healthy adult subjects and patients with CF.

Treatment of overdosage consists of general supportive measures including monitoring of vital signs and observation of the clinical status.

• Dec 20, 2024NDANDA218730Vertex Pharms Inc

1. 1Rash347.0%
2. 2Headache336.7%
3. 3Hospitalisation316.3%
4. 4Diarrhoea285.7%
5. 5Liver Function Test Increased275.5%
6. 6Anxiety265.3%
7. 7Fatigue265.3%
8. 8Dyspnoea204.1%
9. 9Infective Pulmonary Exacerbation Of Cystic Fibrosis183.7%
10. 10Nausea183.7%
11. 11Abdominal Pain Upper163.3%
12. 12Gastrointestinal Disorder153.1%
13. 13Mental Disorder153.1%
14. 14Alanine Aminotransferase Increased142.9%
15. 15Aspartate Aminotransferase Increased132.7%

The 10 most recently updated of 16 ClinicalTrials.gov registrations naming Deutivacaftor as an intervention. Registration is not evidence of efficacy or safety — reference crosswalk only.

• Evaluation of VX-121/Tezacaftor/Deutivacaftor in Cystic Fibrosis (CF) Participants 1 Through 11 Years of Age
  Active not recruiting · Phase 3 · Interventional · 210 enrolled · Vertex Pharmaceuticals Incorporated
  NCT05422222updated 2026-05-28
• Evaluation of VX-828 in Healthy Participants and in Participants With Cystic Fibrosis
  Active not recruiting · Phase 1 · Interventional · 165 enrolled · Vertex Pharmaceuticals Incorporated
  NCT06154447updated 2026-05-26
• A Study Evaluating the Long-term Safety and Efficacy of VX-121 Combination Therapy
  Active not recruiting · Phase 3 · Interventional · 822 enrolled · Vertex Pharmaceuticals Incorporated
  NCT05444257updated 2026-05-05
• Evaluation of Long-Term Safety and Efficacy of Vanzacaftor/Tezacaftor/Deutivacaftor in Cystic Fibrosis Participants 1 Year of Age and Older
  Enrolling by invitation · Phase 3 · Interventional · 174 enrolled · Vertex Pharmaceuticals Incorporated
  NCT05844449updated 2026-04-29
• Effect of Vanzacaftor/Tezacaftor/Deutivacaftor (VNZ/TEZ/D-IVA) on the PK of Rosuvastatin in Healthy Participants
  Completed · Phase 1 · Interventional · 18 enrolled · Vertex Pharmaceuticals Incorporated
  NCT07349394updated 2026-04-02
• Modulate-CF: Cystic Fibrosis Transmembrane Regulator (CFTR) Biomarker Study to Evaluate the Rescue of Mutant CFTR in Patients With Cystic Fibrosis Treated With CFTR-modulators
  Recruiting · Observational · 500 enrolled · Charite University, Berlin, Germany
  NCT04732910updated 2026-02-24
• Restarting Triple Therapy With Robust Monitoring for Adverse Events (RETRIAL)
  Recruiting · Observational · 200 enrolled · Boston Children's Hospital
  NCT06683092updated 2025-11-03
• A Study To Evaluate the Relative Bioavailability, Food Effect, and Dose Proportionality of a Granule Formulation of Vanzacaftor/Tezacaftor/Deutivacaftor(VNZ/TEZ/D-IVA)
  Completed · Phase 1 · Interventional · 34 enrolled · Vertex Pharmaceuticals Incorporated
  NCT06299709updated 2025-09-26
• A Phase 3 Study of VX-121 Combination Therapy in Participants With Cystic Fibrosis (CF) Heterozygous for F508del and a Minimal Function Mutation (F/MF)
  Completed · Phase 3 · Interventional · 435 enrolled · Vertex Pharmaceuticals Incorporated
  NCT05033080updated 2024-10-03
• A Study of VX-121 Combination Therapy in Participants With Cystic Fibrosis (CF) Who Are Homozygous for F508del, Heterozygous for F508del and a Gating (F/G) or Residual Function (F/RF) Mutation, or Have At Least 1 Other Triple Combination Responsive (TCR) CFTR Mutation and No F508del Mutation
  Completed · Phase 3 · Interventional · 597 enrolled · Vertex Pharmaceuticals Incorporated
  NCT05076149updated 2024-06-13

Frequently asked questions

How does Deutivacaftor work?

Vanzacaftor and tezacaftor bind to different sites on the CFTR protein and have an additive effect in facilitating the cellular processing and trafficking of select mutant forms of CFTR (including F508del- CFTR) to increase the amount of CFTR protein delivered to the cell surface compared to either molecule alone. Deutivacaftor potentiates the channel open probability (or gating) of the CFTR protein at the cell surface.

What is Deutivacaftor used for?

According to FDA labeling, Deutivacaftor carries indications including: ALYFTREK is indicated for the treatment of cystic fibrosis (CF) in adult and pediatric patients 6 years of age and older who have a clinical diagnosis of CF and who have at least one variant in the cystic fibrosis transmembrane conductance regulator ( CFTR ) gene that is either responsive based on clinical and/or in vitro data (see Table 5 ) or results in production of CFTR protein [see Clinical Pharmacology (12.1) ]. If the patient's genotype is unknown, an FDA-cleared CF genetic test should be used to confirm the presence of at least one variant in the CFTR gene that is either responsive based on clinical and/or in vitro data or results in production of CFTR protein.. This is a reference summary of labeled uses, not medical advice or a treatment recommendation.

What class of drug is Deutivacaftor?

Deutivacaftor is classified as Cystic Fibrosis Transmembrane Conductance Regulator Potentiator, Breast Cancer Resistance Protein Inhibitors, Chloride Channel Activation Potentiators, Cytochrome P450 2C9 Inhibitors, P-Glycoprotein Inhibitors.

What are the brand names for Deutivacaftor?

Deutivacaftor is marketed under brand names including Alyftrek.

What are the contraindications for Deutivacaftor?

Deutivacaftor labeling lists contraindications including: None. None.. Always consult the full prescribing information and a clinician.