If You Suspect Gaucher Disease, Test to Know
A blood-based enzyme assay or a genetic test can confirm a diagnosis:
Beta-glucosidase enzyme assay is the standard recommended method for establishing a confirmatory diagnosis of Gaucher disease, which is demonstrated by deficiency of beta-glucosidase activity1
Molecular testing (DNA testing) can be used to establish a diagnosis of Gaucher disease,
as well as carrier status1,2
A bone marrow biopsy is typically not necessary or recommended to diagnose Gaucher disease because although bone marrow biopsy specimens can rule out hematologic malignancies, they are not reliable for establishing the presence of Gaucher cells.3
Consequences of Delayed Diagnosis
When the diagnosis is missed, a patient with Gaucher disease type 1 may experience lengthy diagnostic delays3
This Diagnostic Algorithm May Help You Know When to Test for Gaucher Disease1
Blood-based enzyme assay (beta-glucosidase) is the gold standard for definitive diagnosis of Gaucher disease.
Adapted from Mistry PK et al. Am J Hematol. 2011;86(1):100-115.
Indication and Usage
CERDELGA is indicated for the long-term treatment of adult patients with Gaucher disease type 1 (GD1) who are CYP2D6 extensive metabolizers (EMs), intermediate metabolizers (IMs), or poor metabolizers (PMs) as detected by an FDA-cleared test.
Limitations of Use:
- Patients who are CYP2D6 ultra-rapid metabolizers (URMs) may not achieve adequate concentrations of CERDELGA to achieve a therapeutic effect.
- A specific dosage cannot be recommended for those patients whose CYP2D6 genotype cannot be determined (indeterminate metabolizers).
Important Safety Information
CERDELGA is contraindicated in the following patients based on CYP2D6 metabolizer status due to the risk of cardiac arrhythmias from prolongation of the PR, QTc, and/or QRS cardiac intervals:
- Extensive Metabolizers (EMs) taking a strong or moderate CYP2D6 inhibitor concomitantly with a strong or moderate CYP3A inhibitor, EMs with moderate or severe hepatic impairment, or EMs with mild hepatic impairment and taking a strong or moderate CYP2D6 inhibitor.
- Intermediate Metabolizers (IMs) taking a strong or moderate CYP2D6 inhibitor concomitantly with a strong or moderate CYP3A inhibitor, IMs taking a strong CYP3A inhibitor, or IMs with any degree of hepatic impairment.
- Poor Metabolizers (PMs) taking a strong CYP3A inhibitor, or PMs with any degree of hepatic impairment.
WARNINGS AND PRECAUTIONS
CERDELGA is predicted to cause increases in ECG intervals (PR, QTc, and QRS) at substantially elevated plasma concentrations and may increase risk of cardiac arrhythmias. Use of CERDELGA is contraindicated, to be avoided, or requires dosage adjustment in patients taking CYP2D6 or CYP3A inhibitors, depending on CYP2D6 metabolizer status, type of inhibitor, or degree of hepatic impairment. Avoid use of CERDELGA in patients with pre-existing cardiac disease, long QT syndrome, or in combination with Class IA or Class III antiarrhythmic medications.
The most common adverse reactions (≥10%) to CERDELGA include: fatigue, headache, nausea, diarrhea, back pain, pain in extremities, and upper abdominal pain.
Coadministration of CERDELGA with CYP2D6 or CYP3A inhibitors may increase eliglustat concentrations, which may increase the risk of cardiac arrhythmias from prolongations of the PR, QTc, and/or QRS cardiac interval. Use of CERDELGA is contraindicated, to be avoided, or may require dosage adjustment depending on the concomitant drug and CYP2D6 metabolizer status. See section 7 of the full Prescribing Information for more details and other potentially significant drug interactions.
USE IN SPECIFIC POPULATIONS
Available data on the use of CERDELGA in pregnant women is not sufficient to assess drug-associated risks of major birth defects, miscarriage, or adverse maternal or fetal outcomes. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for CERDELGA and any potential adverse effects on the breastfed child from CERDELGA or from the underlying maternal condition.
Use of CERDELGA in patients with renal impairment is based on the patient’s CYP2D6 metabolizer status. Avoid use of CERDELGA in EMs with end-stage renal disease (ESRD), and IMs and PMs with any degree of renal impairment.
Use of CERDELGA is contraindicated or may require dosage adjustment in patients with hepatic impairment based on CYP2D6 metabolizer status, concomitant use of CYP2D6 or CYP3A inhibitors, and degree of hepatic impairment.
Please see accompanying full Prescribing Information.
References: 1. Mistry PK, Cappellini MD, Lukina E, et al. A reappraisal of Gaucher disease-diagnosis and disease management algorithms. Am J Hematol. 2011;86(1):110-115. 2. Stirnemann J, Belmatoug N, Camou F, et al. A review of Gaucher disease pathophysiology, clinical presentation and treatments. Int J Mol Sci. 2017;18(2):441. 3. Mistry PK, Sadan S, Yang R, et al. Consequences of diagnostic delays in type 1 Gaucher disease: the need for greater awareness among hematologists–oncologists and an opportunity for early diagnosis and intervention. Am J Hematol. 2007;82(8):697-701. 4. Cerdelga [prescribing information]. Cambridge, MA: Sanofi. 5. Peterschmitt MJ, Cox GF, Ibrahim J, et al. A pooled analysis of adverse events in 393 adults with Gaucher disease type 1 from four clinical trials of oral eliglustat: evaluation of frequency, timing, and duration. Blood Cells Mol Dis. 2018;68:185-191.