Total dose should not exceed 550 mg/m 2 or 450 mg/m 2 in patients with previous or concomitant treatment with daunorubicin, cyclophosphamide, or irradiation of the cardiac region; irreversible myocardial toxicity may occur as total dosage approaches 550 mg/m 2 . A baseline cardiac evaluation (ECG, LVEF, +/- ECHO) is recommended, especially in patients with risk factors for increased cardiac toxicity and in pediatric patients. Pediatric patients are at increased risk for delayed cardiotoxicity. Reduce dose in patients with impaired hepatic function; severe myelosuppression is also possible. Secondary acute myelogenous leukemia may occur following treatment.
I.V. use only. Doxorubicin is a potent vesicant; if extravasation occurs, severe tissue damage leading to ulceration and necrosis, and pain may occur.
>10%:
Dermatologic: Alopecia, radiation recall
Gastrointestinal: Nausea, vomiting, stomatitis, GI ulceration, anorexia, diarrhea
Genitourinary: Discoloration of urine, mild dysuria, urinary frequency, hematuria, bladder spasms, cystitis following bladder instillation
Hematologic: Myelosuppression, primarily leukopenia (75%); thrombocytopenia and anemia
Onset: 7 days
Nadir: 10-14 days
Recovery: 21-28 days
1% to 10%:
Cardiovascular: Transient ECG abnormalities (supraventricular tachycardia, S-T wave changes, atrial or ventricular extrasystoles); generally asymptomatic and self-limiting. CHF, dose related, may be delayed for 7-8 years after treatment. Cumulative dose, mediastinal/pericardial radiation therapy, cardiovascular disease, age, and use of cyclophosphamide (or other cardiotoxic agents) all increase the risk.
Recommended maximum cumulative doses:
No risk factors: 550 mg/m 2
Concurrent radiation: 450 mg/m 2
Note: Regardless of cumulative dose, if the left ventricular ejection fraction is <30% to 40%, the drug is usually not given.
Dermatologic: Skin "flare" at injection site; discoloration of saliva, sweat, or tears
Endocrine & metabolic: Hyperuricemia
<1%: Pericarditis, myocarditis, myocardial infection, skin rash, pigmentation of nail beds, nail banding, onycholysis, urticaria, infertility, sterility, elevations of bilirubin and transaminases, hepatitis, systemic hypersensitivity (including urticaria, pruritus, angioedema, dysphagia, and dyspnea)
Allopurinol may enhance the antitumor activity of doxorubicin (animal data only).
Cyclophosphamide enhances the cardiac toxicity of doxorubicin by producing additional myocardial cell damage.
Cyclosporine may decrease clearance of parent and metabolite and may induce coma or seizures and enhance hematologic toxicity.
CYP2B6 substrates: Doxorubicin may increase the levels/effects of CYP2B6 substrates. Example substrates include bupropion, promethazine, propofol, selegiline, and sertraline.
CYP2D6 inhibitors: May increase the levels/effects of doxorubicin. Example inhibitors include chlorpromazine, delavirdine, fluoxetine, miconazole, paroxetine, pergolide, quinidine, quinine, ritonavir, and ropinirole.
CYP3A4 inducers: CYP3A4 inducers may decrease the levels/effects of doxorubicin. Example inducers include aminoglutethimide, carbamazepine, nafcillin, nevirapine, phenobarbital, phenytoin, and rifamycins.
CYP3A4 inhibitors: May increase the levels/effects of doxorubicin. Example inhibitors include azole antifungals, ciprofloxacin, clarithromycin, diclofenac, doxycycline, erythromycin, imatinib, isoniazid, nefazodone, nicardipine, propofol, protease inhibitors, quinidine, and verapamil.
Digoxin: Doxorubicin may decrease plasma levels and effectiveness of digoxin.
Mercaptopurine increases toxicities.
Paclitaxel reduces doxorubicin clearance and increases toxicity if administered prior to doxorubicin.
Phenobarbital increases elimination (decreases effect) of doxorubicin.
Phenytoin: Doxorubicin may decrease plasma levels and effectiveness of phenytoin.
Progesterone: High doses of progesterone enhance toxicity (neutropenia and thrombocytopenia).
Streptozocin greatly enhances leukopenia and thrombocytopenia.
Verapamil alters the cellular distribution of doxorubicin and may result in increased cell toxicity by inhibition of the P-glycoprotein pump. Based on mouse studies, cardiotoxicity may be enhanced by verapamil.
Zidovudine: Doxorubicin may decrease the antiviral activity of zidovudine.
Store intact vials of solution under refrigeration (2°C to 8°C) and protect from light; store intact vials of lyophilized powder at room temperature (15°C to 30°C).
Reconstitute lyophilized powder with NS to a final concentration of 2 mg/mL as follows. Reconstituted solution is stable for 7 days at room temperature (25°C) and 15 days under refrigeration (5°C) when protected from light.
Further dilution in D5W or NS is stable for 48 hours at room temperature (25°C) when protected from light
Unstable in solutions with a pH <3 or >7. Avoid aluminum needles as precipitation or decomposition (darkening of solution) may occur; protect from direct sunlight.
Incompatible with aminophylline, cephalothin, dexamethasone, diazepam, fluorouracil, furosemide, heparin, hydrocortisone, sodium bicarbonate
Y-site compatible with bleomycin, cyclophosphamide, dacarbazine, vinblastine, vincristine
Standard I.V. dilution:
I.V. push: Dose/syringe (concentration: 2 mg/mL)
Syringes are stable for 7 days at room temperature (25°C) and 15 days under refrigeration (5°C) when protected from light
IVPB: Dose/50-100 mL D5W or NS
IVPB solutions are stable for 48 hours at room temperature (25°C) when protected from light
Y-site administration: Compatible: Amifostine, aztreonam, bleomycin, chlorpromazine, cimetidine, cisplatin, cladribine, cyclophosphamide, dexamethasone sodium phosphate, diphenhydramine, droperidol, etoposide phosphate, famotidine, filgrastim, fludarabine, fluorouracil, gatifloxacin, gemcitabine, granisetron, hydromorphone, leucovorin, linezolid, lorazepam, melphalan, methotrexate, methylprednisolone sodium succinate, metoclopramide, mitomycin, morphine, ondansetron, paclitaxel, prochlorperazine edisylate, promethazine, ranitidine, sargramostim, sodium bicarbonate, teniposide, thiotepa, topotecan, vinblastine, vincristine, vinorelbine. Incompatible: Allopurinol, amphotericin B cholesteryl sulfate complex, cefepime, ganciclovir, piperacillin/tazobactam, propofol. Variable (consult detailed reference): Furosemide, heparin
Compatibility in syringe: Compatible: Bleomycin, cisplatin, cyclophosphamide, droperidol, leucovorin, methotrexate, metoclopramide, mitomycin, vinblastine, vincristine. Incompatible: Furosemide, heparin. Variable (consult detailed reference): Fluorouracil
Compatibility when admixed: Compatible: Dacarbazine, ondansetron, ondansetron with vincristine, paclitaxel, vinblastine. Incompatible: Aminophylline, diazepam, fluorouracil. Variable (consult detailed reference): Dacarbazine with ondansetron, etoposide with vincristine
Absorption: Oral: Poor (<50%)
Distribution: Vd: 25 L/kg; to many body tissues, particularly liver, spleen, kidney, lung, heart; does not distribute into the CNS; crosses placenta
Protein binding, plasma: 70%
Metabolism: Primarily hepatic to doxorubicinol (active), then to inactive aglycones, conjugated sulfates, and glucuronides
Half-life elimination:
Distribution: 10 minutes
Elimination: Doxorubicin: 1-3 hours; Metabolites: 3-3.5 hours
Terminal: 17-30 hours
Male: 54 hours; Female: 35 hours
Excretion: Feces (~40% to 50% as unchanged drug); urine (~3% to 10% as metabolites, 1% doxorubicinol, <1% adriamycine aglycones, and unchanged drug)
Clearance: Male: 113 L/hour; Female: 44 L/hour
Children:
35-75 mg/m 2 as a single dose, repeat every 21 days or
20-30 mg/m 2 once weekly or
60-90 mg/m 2 given as a continuous infusion over 96 hours every 3-4 weeks
Adults: Usual or typical dose: 60-75 mg/m 2 as a single dose, repeat every 21 days or other dosage regimens like 20-30 mg/m 2 /day for 2-3 days, repeat in 4 weeks or 20 mg/m 2 once weekly
The lower dose regimen should be given to patients with decreased bone marrow reserve, prior therapy or marrow infiltration with malignant cells
Dosing adjustment in renal impairment:
Mild to moderate renal failure: Adjustment is not required
Clcr<10 mL/minute: Administer 75% of normal dose
Hemodialysis: Supplemental dose is not necessary
Dosing adjustment in hepatic impairment:
ALT/AST 2-3 times ULN: Administer 75% of dose
ALT/AST >3 times ULN
or
bilirubin 1.2-3 mg/dL (20-51
mol/L): Administer 50% of dose
Bilirubin 3.1-5 mg/dL (51-85
mol/L): Administer 25% of dose
Bilirubin >5 mg/dL (85
mol/L): Do not administer
Extravasation management: Apply ice immediately for 30-60 minutes; then alternate off/on every 15 minutes for 1 day. Topical cooling may be achieved using ice packs or cooling pad with circulating ice water. Cooling of site for 24 hours as tolerated by the patient. Elevate and rest extremity 24-48 hours, then resume normal activity as tolerated. Application of cold inhibits vesicant's cytotoxicity. Application of heat or sodium bicarbonate can be harmful and is contraindicated. If pain, erythema, and/or swelling persist beyond 48 hours, refer patient immediately to plastic surgeon for consultation and possible debridement.
20 mg: Moderately low (10% to 30%)
>20 mg or <60 mg: Moderate (30% to 60%)
60 mg: Moderately high (60% to 90%)
Time course for nausea/vomiting: Onset: 1-3 hours; Duration 4-24 hours
Injection, powder for reconstitution, as hydrochloride: 10 mg, 20 mg, 50 mg [contains lactose]
Adriamycin RDF®: 10 mg, 20 mg, 50 mg, 150 mg [contains lactose; rapid dissolution formula]
Rubex®: 50 mg, 100 mg [contains lactose]
Injection, solution, as hydrochloride [preservative free]: 2 mg/mL (5 mL, 10 mL, 25 mL, 100 mL)
Adriamycin PFS® [preservative free]: 2 mg/mL (5 mL, 10 mL, 25 mL, 37.5 mL, 100 mL)
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Namer M, "Anthracyclines in the Adjuvant Treatment of Breast Cancer," Drugs , 1993, 45(Suppl 2):4-9.
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Speyer JL, Green MD, Kramer E, et al, "Protective Effect of the Bispiperazinedione ICRF-187 Against Doxorubicin-Induced Cardiac Toxicity in Women With Advanced Breast Cancer," N Engl J Med , 1988, 319(12):745-52.
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