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Información de la droga para Totect Kit (dexrazoxane) for injection, for intravenous infusion onlyInitial U.S. Approval: 2007 (TopoTarget USA): 14 CLINICAL STUDIES
- 1 INDICATIONS AND USAGE
- 2 DOSAGE AND ADMINISTRATION
- 3 DOSAGE FORMS AND STRENGTHS
- 4 CONTRAINDICATIONS
- 7 DRUG INTERACTIONS
- 10 OVERDOSAGE
- 11 DESCRIPTION
- 14 CLINICAL STUDIES
- 15 REFERENCES
- 16 HOW SUPPLIED/STORAGE AND HANDLING
- 17 PATIENT COUNSELING INFORMATION
Totect® was studied in two open-label, single arm, multi-center studies testing whether Totect® administration could reduce tissue injury following anthracycline extravasation and thereby reduce or avoid surgical intervention.
In the studies, eligible patients were receiving single-agent anthracycline intravenously (usually as part of combination chemotherapy) and developed extravasation symptoms of pain, burning, swelling, and/or redness near the infusion site. Skin biopsy samples from the suspected skin area were examined for the presence of anthracycline as determined by the presence of tissue fluorescence; however, therapy was not delayed for this test result.
In both studies, treatment with Totect® was to begin as soon as possible and no later than 6 hours after extravasation with retreatment 24 and 48 hours later (a total of 3 doses). Totect® was administered as 1-2 hour IV infusions through a different venous access location. The first and second doses were 1000 mg/m2 and the third dose was 500 mg/m2. No dose modifications were planned except for patients whose body surface area exceeded 2.0 m2, in which case the total daily dose limit on the first and second day was 2000 mg/day and 1000 mg on the third day.
In total, 80 patients were enrolled and 57 were evaluable. Demographics in the two studies were similar. The median age was 57 years, and sixty-five percent of patients were women. The anthracyclines most commonly associated with extravasation were epirubicin (56%) and doxorubicin (41%). Peripheral IV sites of extravasation included the forearm in 63%, the hand in 21%, and the antecubital area in 11%; four patients (5%) received the anthracycline via a central venous access device (CVAD). Most patients presented with swelling (83%), redness (78%), and pain (43%). The median baseline lesion area was 25 cm2 (range 1-253 cm2).
Evaluable patients had to be receiving IV anthracycline (single agent or in combination) at the time of extravasation, to have skin biopsies showing fluorescence, and to receive the first Totect® dose within 6 hours of the extravasation.
In study 1, none of the 19 evaluable patients required surgical intervention and none had serious late sequelae. In study 2, one of the 38 evaluable patients required surgery. One additional non-evaluable patient required surgery for tissue necrosis. Thirteen patients had late sequelae at the event site such as site pain, fibrosis, atrophy, and local sensory disturbance; all were judged as mild except in the one patient who required surgery. None of the 4 patients with CVADs required surgical intervention.
- Drug Information Provided by National Library of Medicine (NLM).