Halaven (Eribulin)

Halaven is indicated for the treatment of certain advanced solid tumors in patients who have previously received chemotherapy. It is administered under the direction of an oncologist and is part of a broader cancer management plan.

• Metastatic breast cancer that has progressed after at least two prior chemotherapy regimens.
• Unresectable or metastatic liposarcoma in patients who have received prior systemic therapy.
• As part of combination therapy protocols when clinically appropriate.
• In patients with measurable disease as defined by RECIST criteria.
• For use in clinical settings where intravenous infusion is feasible.

Eribulin may cause a range of side effects, some of which are more frequently observed while others are less common but potentially serious.

Common

• Fatigue or weakness that may affect daily activities.
• Nausea and occasional vomiting, often manageable with anti‑emetics.
• Decreased white blood cell counts, increasing infection risk.
• Peripheral neuropathy presenting as tingling or numbness in extremities.
• Mild to moderate hair loss.
• Decreased platelet count leading to easy bruising.

Serious

• Severe neutropenia with fever, indicating possible infection.
• Significant liver enzyme elevations suggesting hepatic toxicity.
• Cardiac events such as arrhythmias or decreased ejection fraction.
• Severe peripheral neuropathy causing functional impairment.
• Life‑threatening allergic reactions including anaphylaxis.
• Tumor lysis syndrome in patients with high tumor burden.

Before initiating Halaven therapy, clinicians should evaluate patient history and monitor specific clinical parameters throughout treatment.

• Assess baseline blood counts and liver function tests; repeat regularly.
• Monitor for signs of infection due to neutropenia.
• Evaluate cardiac function, especially in patients with pre‑existing heart disease.
• Use caution in patients with pre‑existing peripheral neuropathy.
• Adjust dose or discontinue if severe adverse events occur.
• Counsel patients on contraception and potential pregnancy risks.
• Provide patient education on recognizing symptoms of serious side effects.

Eribulin may interact with other medications, affecting its safety profile or therapeutic efficacy.

Avoid

• Concurrent use of strong CYP3A4 inducers that may reduce eribulin exposure.
• Live vaccines during periods of significant neutropenia.
• Other myelosuppressive agents without dose adjustments.

Use with caution

• Antiemetic agents that may prolong QT interval.
• Drugs known to cause peripheral neuropathy, such as certain antiretrovirals.
• Medications that affect hepatic metabolism, including some antifungals.
• Herbal supplements that influence liver enzymes, like St. John's wort.