Dimethyl Fumarate (Systemic)
Brand names: Tecfidera
Drug class:
Antineoplastic Agents
Usage of Dimethyl Fumarate (Systemic)
Multiple Sclerosis
Treatment of relapsing forms of MS, including clinically isolated syndrome, relapsing-remitting disease, and active secondary progressive disease.
Dimethyl fumarate is one of several disease-modifying therapies used in the management of relapsing forms of MS. Although not curative, these therapies have all been shown to modify several measures of disease activity, including relapse rates, new or enhancing magnetic resonance imaging (MRI) lesions, and disability progression.
The American Academy of Neurology (AAN) recommends that disease-modifying therapy be offered to patients with relapsing forms of MS who have had recent relapses and/or MRI lesion activity. Clinicians should consider adverse effects, tolerability, method of administration, safety, efficacy, and cost of the drugs in addition to patient preferences when selecting an appropriate therapy.
Direct comparative studies between dimethyl fumarate and other oral drugs used in relapsing forms of MS (e.g., fingolimod, teriflunomide) not performed to date; however, clinical experience suggests that dimethyl fumarate may be more effective than teriflunomide and better tolerated than fingolimod.
Efficacy not established in patients with primary-progressive MS† [off-label].
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How to use Dimethyl Fumarate (Systemic)
General
Patient Monitoring
Premedication and Prophylaxis
Administration
Oral Administration
Administer orally twice daily with or without food. Administration with food may reduce incidence of flushing and improve GI tolerability.
Swallow delayed-release capsules whole and intact. Do not crush or chew capsules; do not sprinkle the contents of the capsules on food.
Dosage
Adults
Relapsing Forms of Multiple Sclerosis OralInitially, 120 mg twice daily. After 7 days, increase to maintenance dosage of 240 mg twice daily.
In patients who do not tolerate the usual maintenance dosage, consider a temporary dosage reduction from 240 mg twice daily to 120 mg twice daily. Resume recommended maintenance dosage of 240 mg twice daily within 4 weeks. Consider drug discontinuance in patients unable to tolerate a return to the usual maintenance dosage.
Special Populations
Hepatic Impairment
No dosage adjustment necessary.
Renal Impairment
No dosage adjustment necessary.
Geriatric Patients
No dosage adjustment necessary.
Warnings
Contraindications
Warnings/Precautions
Anaphylaxis and Angioedema
May cause anaphylaxis or angioedema after the first dose or at any time during therapy. Signs and symptoms of hypersensitivity reactions have included difficulty breathing, urticaria, and swelling of the throat and tongue.
Progressive Multifocal Leukoencephalopathy (PML)
PML, an opportunistic infection of the brain caused by the JC virus, reported. A fatal case of PML occurred in a patient with MS treated with dimethyl fumarate for 4 years in a clinical trial. The patient had prolonged lymphopenia (i.e., lymphocyte counts predominantly <500/mm3 for 3.5 years) but no other known conditions associated with compromised immune function.
PML also reported during postmarketing experience in the presence of lymphopenia persisting for >6 months. In addition, several cases of PML have been reported in Europe in patients receiving other preparations containing dimethyl fumarate.
At the first sign or symptom suggestive of PML, immediately withhold dimethyl fumarate therapy and perform an appropriate diagnostic evaluation. MRI signs of PML may be apparent before clinical manifestations develop.
Infectious Complications
Serious cases of herpes zoster and other opportunistic infections (viral, fungal, and bacterial) reported in patients with lymphopenia as well as in patients with normal absolute lymphocyte counts. May occur at any time during therapy.
Monitor for signs and symptoms of herpes zoster or other opportunistic infections. If manifestations of such infections occur, promptly evaluate and treat patient appropriately. Consider interruption of dimethyl fumarate therapy until the infection resolves.
Lymphopenia
May decrease lymphocyte counts. In placebo-controlled clinical trials, mean lymphocyte counts decreased by approximately 30% during the first year of therapy and remained stable thereafter. Lymphocyte counts improved 4 weeks following discontinuance of the drug, but did not return to baseline values.
Although increased incidence of serious infections was not observed in patients with decreased lymphocyte counts in controlled trials, one case of PML developed in the setting of prolonged lymphopenia.
Not studied in patients with preexisting low lymphocyte counts.
Obtain a CBC, including lymphocyte count, prior to initiation of dimethyl fumarate, at 6 months, and then every 6–12 months during therapy thereafter, and as clinically indicated.
In patients with lymphocyte counts <500/mm3 persisting for >6 months, consider interruption of therapy. Consider monitoring lymphocyte counts until lymphopenia has resolved since lymphocyte recovery may be delayed following drug discontinuance.
In patients with serious infections, consider interruption of dimethyl fumarate therapy until the infection resolves. Consider patient's clinical circumstances when deciding whether to restart dimethyl fumarate therapy.
Hepatic Injury
Liver function test abnormalities (e.g., elevations in serum aminotransferase concentrations to more than fivefold the ULN and elevations in total bilirubin concentrations to more than twofold the ULN) reported during postmarketing experience. Occurred within a few days to several months after initiation of therapy and resolved upon treatment discontinuance. Although liver failure or death did not occur, marked elevations in liver function tests may be indicative of serious hepatic injury.
Perform liver function tests (i.e., serum aminotransferase, alkaline phosphatase, and total bilirubin concentrations) prior to and during therapy as clinically indicated. Discontinue drug if liver injury suspected.
Flushing
May cause flushing (e.g., warmth, redness, itching, burning sensation). In clinical trials, 40% of dimethyl fumarate-treated patients experienced flushing. Symptoms generally are mild to moderate, begin soon after initiating therapy, and improve or resolve over time.
Administration with food or pretreatment with non-enteric-coated aspirin may reduce incidence and/or severity of flushing.
Specific Populations
PregnancyNo adequate data on developmental risks associated with use during pregnancy. Embryotoxic effects observed in animal studies.
A pregnancy registry has been established for Tecfidera. Encourage patients to enroll by calling 866-810-1462 or visiting [Web].
LactationNot known whether dimethyl fumarate or its metabolites distribute into human milk.
Effects of the drug on the nursing infant or on milk production not known.
Consider benefits of breast-feeding along with the woman's clinical need for dimethyl fumarate and any potential adverse effects on the breast-fed infant from the drug or underlying maternal condition.
Pediatric UseSafety and efficacy not established in pediatric patients <18 years of age.
Geriatric UseInsufficient experience in patients ≥65 years of age to determine whether they respond differently than younger adults.
Hepatic ImpairmentPharmacokinetics not studied in patients with hepatic impairment.
Renal ImpairmentPharmacokinetics not studied in patients with renal impairment.
Common Adverse Effects
Flushing, abdominal pain, diarrhea, nausea.
What other drugs will affect Dimethyl Fumarate (Systemic)
Not metabolized by CYP isoenzymes; therefore, clinically important interactions with CYP inhibitors or inducers not expected. No potential interactions with dimethyl fumarate or its active MMF metabolite identified in CYP, P-glycoprotein (P-gp), or protein-binding studies.
Specific Drugs
Drug
Interaction
Comments
Aspirin
Non-enteric-coated aspirin (325 mg given approximately 30 minutes before dimethyl fumarate over 4 days) did not alter MMF pharmacokinetics or incidence of adverse GI effects, but reduced incidence and severity of flushing
Diroximel Fumarate
Diroximel fumarate and dimethyl fumarate have the same active metabolite (MMF)
Concomitant use contraindicated
Glatiramer acetate
Single dose of glatiramer acetate did not alter MMF pharmacokinetics
Interferon beta
Single dose of interferon beta-1a did not alter MMF pharmacokinetics
Oral contraceptives
No clinically important effects on oral contraceptive containing ethinyl estradiol and norelgestromin; effects on other progestogens not evaluated
Vaccines
Non-live vaccines: Concomitant exposure to dimethyl fumarate did not attenuate antibody response to tetanus toxoid-containing vaccine, pneumococcal polysaccharide vaccine, or meningococcal vaccine relative to antibody response in interferon-treated patients; impact of these findings on vaccine effectiveness not known
Live-attenuated vaccines: Safety and efficacy in patients receiving dimethyl fumarate not evaluated
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