About MDS
Learning that you or someone you love has MDS (myelodysplastic syndromes) can be very distressing, especially if you've never heard of MDS until now. You may be wondering how this will affect your everyday life or what lies ahead. Though MDS is a serious condition, it's important to realize that treatments are available.
One way to address any concerns you may have about MDS is to become better informed about the condition and what you can do to continue living as healthy as possible.
MDS, or myelodysplastic syndromes, is a group of similar blood disorders in which the bone marrow does not function properly and does not produce enough healthy blood cells. People with MDS typically have low blood cell counts, which means they have abnormally low levels of red blood cells, white blood cells, and/or platelets in the bloodstream.
The word "syndromes" is used in MDS because the symptoms and the course of the disease can vary greatly from person to person and by type of MDS.
MDS is generally not considered cancerous, but in more advanced stages malignant cells may appear.
In a minority of patients these malignant cells may progress to leukemia.
Although MDS can strike people of different ages, it occurs most frequently in adult men over 60 years of age.
Approximately 40,000 to 45,000 people in the US have MDS. It is estimated that a total of 12,000 to 15,000 or more new MDS cases are diagnosed in the US each year.
To understand how MDS develops, you should know a few things about how bone marrow works. Bone marrow is the soft spongy material that fills the center of the bones.
Normal bone marrow acts like a factory that produces as many blood cells as the body needs. Bone marrow produces 3 types of blood cells:
- Red blood cells, which bring oxygen to all parts of the body
- White blood cells, which fight infection
- Platelets, which help to form blood clots and stop bleeding
All blood cells originate from a basic type of cell in bone marrow called a "stem cell." Stem cells are parent cells that make copies of themselves and give rise to generations of immature blood cells, called "blasts." Blasts, in turn, mature into the different types of blood cells needed by the body.
With MDS, there is a defect in one of the stem cells, and this defect is passed on to all the future generations of cells that develop from it. The defect prevents the stem cells from producing mature, functioning blood cells. In some cases, defective stem cells die too early or cause healthy stem cells to die too early. In other cases, defective stem cells may crowd out and overwhelm healthy stem cells so that the marrow is not able to produce enough normal blood cells.
The result is that people with MDS have too many abnormal cells in the marrow and not enough healthy cells in the bloodstream.
Read more about:
- Types of MDS
Classifications of MDS based on number of blasts (immature blood cells) in the bone marrow and bloodstream
- Causes and symptoms
A review of possible causes of the disease, and an overview of possible symptoms
- Diagnosis and prognosis
Descriptions of the blood and bone marrow tests used to diagnose MDS and what they can reveal about a person's prognosis (outlook)
- Treatment options
Information about bone marrow transplantation, blood transfusions, growth factors, antibiotics, chemotherapy, and REVLIMID® (lenalidomide)
- Resources
Web sites and publications offering additional information as well as the emotional support you may need at this time
Remember: This web site is NOT intended to replace open discussions with your healthcare provider about MDS and its treatment. You should always talk to your healthcare provider first about any problems related to how you feel or about treatments you are prescribed.
REVLIMID® (lenalidomide) in combination with dexamethasone is indicated for the treatment of multiple myeloma patients who have received at least one prior therapy.
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REVLIMID® (lenalidomide) is indicated for the treatment of patients with transfusion-dependent anemia due to Low- or Intermediate-1–risk myelodysplastic syndromes associated with a deletion 5q cytogenetic abnormality with or without additional cytogenetic abnormalities.
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WARNINGS:
1. POTENTIAL FOR HUMAN BIRTH DEFECTS.
LENALIDOMIDE IS AN ANALOGUE OF THALIDOMIDE. THALIDOMIDE IS A KNOWN HUMAN TERATOGEN THAT CAUSES SEVERE LIFE-THREATENING HUMAN BIRTH DEFECTS.
IF LENALIDOMIDE IS TAKEN DURING PREGNANCY, IT MAY CAUSE BIRTH DEFECTS OR DEATH TO AN UNBORN BABY. FEMALES SHOULD BE ADVISED TO AVOID PREGNANCY WHILE TAKING REVLIMID® (lenalidomide).
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Special Prescribing Requirements
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BECAUSE OF THIS POTENTIAL TOXICITY AND TO AVOID FETAL EXPOSURE TO REVLIMID® (lenalidomide), REVLIMID® (lenalidomide) IS ONLY AVAILABLE UNDER A SPECIAL RESTRICTED DISTRIBUTION PROGRAM. THIS PROGRAM IS CALLED "RevAssist®".
UNDER THIS PROGRAM, ONLY PRESCRIBERS AND PHARMACISTS REGISTERED WITH THE PROGRAM CAN PRESCRIBE AND DISPENSE THE PRODUCT.
IN ADDITION, REVLIMID® (lenalidomide) MUST ONLY BE DISPENSED TO PATIENTS WHO ARE REGISTERED AND MEET ALL THE CONDITIONS OF THE RevAssist® PROGRAM.
2. HEMATOLOGIC TOXICITY (NEUTROPENIA AND THROMBOCYTOPENIA).
THIS DRUG IS ASSOCIATED WITH SIGNIFICANT NEUTROPENIA AND THROMBOCYTOPENIA. EIGHTY PERCENT OF PATIENTS WITH DEL 5q MYELODYSPLASTIC SYNDROMES HAD TO HAVE A DOSE DELAY/REDUCTION DURING THE MAJOR STUDY.
THIRTY-FOUR PERCENT OF PATIENTS HAD TO HAVE A SECOND DOSE DELAY/REDUCTION. GRADE 3 OR 4 HEMATOLOGIC TOXICITY WAS SEEN IN 80% OF PATIENTS ENROLLED IN THE STUDY.
PATIENTS ON THERAPY FOR DEL 5q MYELODYSPLASTIC SYNDROMES SHOULD HAVE THEIR COMPLETE BLOOD COUNTS MONITORED WEEKLY FOR THE FIRST 8 WEEKS OF THERAPY AND AT LEAST MONTHLY THEREAFTER.
PATIENTS MAY REQUIRE DOSE INTERRUPTION AND/OR REDUCTION. PATIENTS MAY REQUIRE USE OF BLOOD PRODUCT SUPPORT AND/OR GROWTH FACTORS. (SEE DOSAGE AND ADMINISTRATION)
3. DEEP VENOUS THROMBOSIS AND PULMONARY EMBOLISM.
THIS DRUG HAS DEMONSTRATED A SIGNIFICANTLY INCREASED RISK OF DEEP VENOUS THROMBOSIS (DVT) AND PULMONARY EMBOLISM (PE) IN PATIENTS WITH MULTIPLE MYELOMA WHO WERE TREATED WITH REVLIMID® (lenalidomide) COMBINATION THERAPY.
PATIENTS AND PHYSICIANS ARE ADVISED TO BE OBSERVANT FOR THE SIGNS AND SYMPTOMS OF THROMBOEMBOLISM. PATIENTS SHOULD BE INSTRUCTED TO SEEK MEDICAL CARE IF THEY DEVELOP SYMPTOMS SUCH AS SHORTNESS OF BREATH, CHEST PAIN, OR ARM OR LEG SWELLING.
IT IS NOT KNOWN WHETHER PROPHYLACTIC ANTICOAGULATION OR ANTIPLATELET THERAPY PRESCRIBED IN CONJUNCTION WITH REVLIMID® (lenalidomide) MAY LESSEN THE POTENTIAL FOR VENOUS THROMBOEMBOLIC EVENTS.
THE DECISION TO TAKE PROPHYLACTIC MEASURES SHOULD BE DONE CAREFULLY AFTER AN ASSESSMENT OF AN INDIVIDUAL PATIENT’S UNDERLYING RISK FACTORS.
You can get the information about REVLIMID® (lenalidomide) and the RevAssist® program on the Internet at www.REVLIMID.com or by calling the manufacturer's toll-free number at 1-888-423-5436.
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ADDITIONAL WARNINGS: HEMATOLOGIC TOXICITY
Multiple Myeloma
In the pooled multiple myeloma studies, Grade 3 and 4 hematologic toxicities were more frequent in patients treated with the combination of REVLIMID® (lenalidomide) and dexamethasone than in patients treated with dexamethasone alone. Patients on therapy should have their complete blood counts monitored every 2 weeks for the first 12 weeks and then monthly thereafter. Patients may require dose interruption and/or dose reduction.
CONTRAINDICATIONS:
Hypersensitivity: REVLIMID® (lenalidomide) is contraindicated in any patients who have demonstrated hypersensitivity to the drug or its components.
PRECAUTIONS:
Renal impairment: REVLIMID® (lenalidomide) is substantially excreted by the kidney, so the risk of toxic reactions may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it would be prudent to monitor renal function.
Nursing mothers: It is not known whether REVLIMID® (lenalidomide) is excreted in human milk. Because of the potential for adverse reactions in nursing infants, a decision should be made whether to discontinue nursing or the drug, taking into account the importance of the drug to the mother.
ADVERSE REACTIONS:
Multiple Myeloma
In the REVLIMID® (lenalidomide)/dexamethasone treatment group, 151 patients (45%) underwent at least one dose interruption with or without a dose reduction of REVLIMID® (lenalidomide) compared to 21% in the placebo/dexamethasone treatment group. Of these patients who had one dose interruption with or without a dose reduction, 50% in the REVLIMID® (lenalidomide)/dexamethasone treatment group underwent at least one additional dose interruption with or without a dose reduction compared to 21% in the placebo/dexamethasone treatment group.
Other adverse events reported in multiple myeloma patients (REVLIMID® (lenalidomide)/dexamethasone vs dexamethasone/placebo): constipation (39% vs 19%), fatigue (38% vs 37%), insomnia (32% vs 37%), muscle cramp (30% vs 21%), diarrhea (29% vs 25%), neutropenia (28% vs 5%), anemia (24% vs 17%), asthenia (23% vs 25%), pyrexia (23% vs 19%), nausea (22% vs 19%), headache (21% vs 21%), peripheral edema (21% vs 19%), dizziness (21% vs 15%), dyspnea (20% vs 15%), tremor (20% vs 7%), decreased weight (18% vs 14%), thrombocytopenia (17% vs 10%), rash (16% vs 8%), back pain (15% vs 14%), hyperglycemia (15% vs 14%), and muscle weakness (15% vs 15%).
Myelodysplastic Syndromes
Other adverse reactions reported in del 5q MDS patients (REVLIMID® (lenalidomide)): diarrhea (49%), pruritus (42%), rash (36%), fatigue (31%), constipation (24%), nausea (24%), nasopharyngitis (23%), arthralgia (22%), pyrexia (21%), back pain (21%), peripheral edema (20%), cough (20%), dizziness (20%), headache (20%), muscle cramp (18%), dyspnea (17%), and pharyngitis (16%).
DOSAGE AND ADMINISTRATION:
Dosing is continued or modified based upon clinical and laboratory findings. Dosing modifications are recommended to manage Grade 3 or 4 neutropenia or thrombocytopenia or other Grade 3 or 4 toxicity judged to be related to lenalidomide. For other Grade 3 or 4 toxicities judged to be related to lenalidomide, hold treatment and restart at next lower dose level when toxicity has resolved to less than or equal to Grade 2.
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| Please see full Prescribing Information, including Boxed WARNINGS, CONTRAINDICATIONS, PRECAUTIONS, ADVERSE REACTIONS and the FDA-approved MEDICATION GUIDE. |
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