(MIG loo stat)
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Zavesca: 100 mg [contains soybean lecithin]
Brand Names: U.S.
- Enzyme Inhibitor
- Glucosylceramide Synthase Inhibitor
Miglustat competitively and reversibly inhibits the enzyme needed to produce glycosphingolipids and decreases the rate of glycosphingolipid glucosylceramide formation. Glucosylceramide accumulates in type 1 Gaucher disease, causing complications specific to this disease.
Vd: 83-105 L
No evidence of metabolism in humans
Urine (as unchanged drug)
Time to Peak
Plasma: 2-2.5 hours
No binding to plasma proteins
Special Populations Note
Renal function impairment
Limited data suggests that the clearance of miglustat decreases 40% and 60% with mild and moderate renal impairment, respectively; dosage reduction recommended. A decreased clearance of 70% has been suggested in patients with severe renal impairment.
Use: Labeled Indications
Gaucher disease: Treatment of adult patients with mild-to-moderate type 1 Gaucher disease for whom enzyme replacement therapy is not a therapeutic option (eg, due to allergy, hypersensitivity, or poor venous access)
Canadian labeling: Additional use (not in U.S. labeling): Treatment to delay the progression of neurological manifestations in Niemann-Pick type C disease
There are no contraindications listed in the manufacturer’s labeling.
Canadian labeling: Additional contraindications (not in U.S. labeling): Hypersensitivity to miglustat or any component of the formulation; pregnancy
Type 1 Gaucher disease: Oral: 100 mg 3 times daily; dose may be reduced to 100 mg 1-2 times daily in patients with adverse effects (ie, tremor, GI distress)
Niemann-Pick Type C disease (Canadian labeling; not in U.S. labeling): Oral: 200 mg 3 times daily
Refer to adult dosing.
Niemann-Pick Type C disease (Canadian labeling (not in U.S. labeling): Oral:
Children <12 years: Note: Children <4 years of age were not included in clinical trials; dose based on body surface area (BSA):
BSA >1.25 m2: Miglustat 200 mg 3 times daily
BSA >0.88-1.25 m2: Miglustat 200 mg 2 times daily
BSA >0.73-0.88 m2: Miglustat 100 mg 3 times daily
BSA >0.47-0.73 m2: Miglustat 100 mg 2 times daily
BSA ≤0.47 m2: Miglustat 100 mg once daily
Children ≥12 years: Refer to adult dosing.
Dosing: Renal Impairment
Gaucher disease: Adults:
CrCl 50-70 mL/minute/1.73 m2: 100 mg twice daily
CrCl 30-50 mL/minute/1.73 m2: 100 mg once daily
CrCl <30 mL/minute/1.73 m2: Not recommended
Niemann-Pick Type C disease: Canadian labeling (not in U.S. labeling):
Children ≥12 years and Adults:
CrCl 50-70 mL/minute/1.73 m2: 200 mg twice daily
CrCl 30-50 mL/minute/1.73 m2: 100 mg twice daily
CrCl <30 mL/minute/1.73 m2: Not recommended
Children <12 years:
CrCl 50-70 mL/minute/1.73 m2: Administer two-thirds of regular dose in 2 equal doses (adjusted for BSA)
CrCl 30-50 mL/minute/1.73 m2: Administer one-third of regular dose in 2 equal doses (adjusted for BSA)
CrCl <30 mL/minute/1.73 m2: Not recommended
Dosing: Hepatic Impairment
No dosage adjustment provided in manufacturer’s labeling (has not been studied). However, dosage adjustment unlikely because miglustat is not metabolized by the liver.
May be administered with or without food; administration between meals may decrease the incidence of diarrhea. Capsules should be taken at the same time each day at regular intervals. If patient is unable to tolerate or swallow capsule whole and powder is administered, mix powder into a liquid immediately prior to use (do not store); sweetening agents are not expected to interact (data on file [Actelion Pharmaceuticals Ltd, 2011])
May be taken with or without food. Patients with diarrhea should avoid foods with high carbohydrate content.
Store at 20°C to 25°C (68°F to 77°F). Brief exposure to 15°C to 30°C (59°F to 86°F) permitted. Note: Extended storage information may be available; contact product manufacturer to obtain current recommendations.
There are no known significant interactions.
Percentages reported from open-label, uncontrolled monotherapy trials.
Central nervous system: Headache (21% to 22%), dizziness (up to 11%)
Gastrointestinal: Diarrhea (89% to 100%), weight loss (39% to 67%), abdominal pain (18% to 67%), flatulence (29% to 50%), nausea (8% to 22%), vomiting (4% to 11%)
Neuromuscular & skeletal: Tremor (11% to 30%), weakness (17%), leg cramps (4% to 11%)
Ocular: Visual disturbances (up to 17%)
1% to 10%:
Central nervous system: Memory impairment (8%), migraine (up to 6%)
Endocrine & metabolic: Menstrual disorder (up to 6%)
Gastrointestinal: Abdominal distension (8%), constipation (8%), xerostomia (8%), bloating (up to 6%), anorexia (up to 7%), dyspepsia (up to 7%), epigastric pain (up to 6%)
Hematologic: Thrombocytopenia (6% to 7%)
Neuromuscular & skeletal: Back pain (8%), gait instability (8%), paresthesia (up to 7%)
Concerns related to adverse effects:
• Diarrhea: Observed in the majority of patients, many also reported weight loss (within first 12 months of treatment). Incidence decreases over time; foods with high carbohydrate content should be avoided. If symptoms persist, patients should be evaluated for underlying GI disease.
• Peripheral neuropathy: Has been reported; neurologic monitoring is required. Weigh risk versus benefit of therapy if patient develops numbness and tingling; treatment discontinuation may be necessary.
• Platelet counts decreased: Mild decrease in platelet counts (without bleeding) has been observed in patients with type 1 Gaucher disease switched from enzyme replacement therapy or in patients with Niemann-Pick type C disease (not an approved use in the U.S.); monitor platelet counts during therapy.
• Tremor: Exacerbations of existing tremor or tremor may occur. Tremor typically begins within the first month of treatment and may resolve over time (1-3 months) or respond to dosage reduction. Treatment discontinuation may be necessary.
• Renal impairment: Use with caution in patients with renal impairment; dosage adjustments recommended. Not recommended in patients with severe impairment.
• Severe type 1 Gaucher disease: Safety and efficacy have not been established in severe type 1 Gaucher disease.
Concurrent drug therapy issues:
• Imiglucerase: Miglustat increases the clearance of imiglucerase; however, the clinical significance of this is not known; combination therapy is not indicated.
• Experienced physician: Should be administered under the supervision of a physician experienced in treatment of Gaucher disease.
• Registry: A registry has been established and all patients with Gaucher disease, and physicians who treat Gaucher disease are encouraged to participate. Information on the International Collaborative Gaucher Group (ICGG) Gaucher Registry may be obtained at https://www.registrynxt.com or by calling 1-800-745-4447 (ext.15500).
Neurologic evaluations baseline and repeated every 6 months; adverse effects; weight; platelet count; renal function
Canadian labeling: Additional monitoring parameters (not in U.S. labeling): pregnancy test prior to therapy in women of reproductive age; disease status (eg, spleen and liver volumes and hematologic analysis); growth [in pediatric patients]; follow-up in patients with a history or presence of cataracts; vitamin B12
Pregnancy Risk Factor
Adverse events were observed in animal reproduction studies. In addition, adverse effects on spermatogenesis and reduced fertility were observed in male animal studies; however, no effect on sperm was observed in healthy male patients. Uncontrolled type 1 Gaucher disease is associated an increased risk of spontaneous abortion; maternal hepatosplenomegaly and thrombocytopenia may also occur and lead to adverse pregnancy outcomes.
The Canadian manufacturer recommends that women of reproductive potential should use effective contraception during therapy and male patients should use reliable contraception during therapy and for 3 months following treatment. The Canadian labeling also recommends that all women have a pregnancy test prior to initiation of therapy; use is contraindicated in women who are or may become pregnant.
• Discuss specific use of drug and side effects with patient as it relates to treatment. (HCAHPS: During this hospital stay, were you given any medicine that you had not taken before? Before giving you any new medicine, how often did hospital staff tell you what the medicine was for? How often did hospital staff describe possible side effects in a way you could understand?)
• Patient may experience dizziness, dyspepsia, pyrosis, nausea, flatulence, xerostomia, back pain, constipation, cramps, headache, lack of appetite, bloating, asthenia, weight loss, painful extremities, or menstrual irregularities. Have patient report immediately to prescriber severe diarrhea, paresthesia, vision changes, ecchymosis, hemorrhaging, memory impairment, significant headache, tremors, or abnormal gait (HCAHPS).
• Educate patient about signs of a significant reaction (eg, wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat). Note: This is not a comprehensive list of all side effects. Patient should consult prescriber for additional questions.
Intended Use and Disclaimer: Should not be printed and given to patients. This information is intended to serve as a concise initial reference for healthcare professionals to use when discussing medications with a patient. You must ultimately rely on your own discretion, experience and judgment in diagnosing, treating and advising patients.
More about miglustat
- Other brands: Zavesca