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Patients being treated with MUTAMYCIN (mitomycin) must be observed carefully and frequently during and after therapy.
The use of MUTAMYCIN (mitomycin) results in a high incidence of bone marrow suppression, particularly thrombocytopenia and leukopenia. Therefore, the following studies should be obtained repeatedly during therapy and for at least eight weeks following therapy: platelet count, white blood cell count, differential, and hemoglobin. The occurrence of a platelet count below 100,000/mm3 or a WBC below 4,000/mm3 or a progressive decline in either is an indication to withhold further therapy until blood counts have recovered above these levels.
Patients should be advised of the potential toxicity of this drug, particularly bone marrow suppression. Deaths have been reported due to septicemia as a result of leukopenia due to the drug.
Usage in Pregnancy
Safe use of MUTAMYCIN (mitomycin) in pregnant women has not been established. Teratological changes have been noted in animal studies. The effect of MUTAMYCIN (mitomycin) on fertility is unknown.
Acute shortness of breath and severe bronchospasm have been reported following the administration of vinca alkaloids in patients who had previously or simultaneously received MUTAMYCIN (mitomycin) . The onset of this acute respiratory distress occurred within minutes to hours after the vinca alkaloid injection. The total number of doses for each drug has varied considerably. Bronchodilators, steroids and/or oxygen have produced symptomatic relief.
A few cases of adult respiratory distress syndrome have been reported in patients receiving MUTAMYCIN (mitomycin) in combination with other chemotherapy and maintained at FIO2 concentrations greater than 50% perioperatively. Therefore, caution should be exercised using only enough oxygen to provide adequate arterial saturation since oxygen itself is toxic to the lungs. Careful attention should be paid to fluid balance and overhydration should be avoided.
It is not known if mitomycin is excreted in human milk. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants from mitomycin, it is recommended that nursing be discontinued when receiving mitomycin therapy.
Safety and effectiveness in pediatric patients have not been established.
Last reviewed on RxList: 10/24/2008
This monograph has been modified to include the generic and brand name in many instances.
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