Vinorelbine Tartrate

Indications

Vinorelbine is indicated:

In combination with cisplatin for first-line treatment of patients with locally advanced or metastatic non-small cell lung cancer (NSCLC)
As a single agent, for the treatment of patients with metastatic NSCLC

Pharmacology

Vinorelbine, a semisynthetic vinblastine derivative, binds to tubulin and inhibits microtubule formation. This disrupts the formation of the mitotic spindle thereby arresting the cell at metaphase.

Dosage And Administration

Intravenous (Adult):

Cervical cancer: 30 mg/m2 days 1 and 8 of a 21-day treatment cycle.

Breast cancer, Ovarian cancer: 25 mg/m2 dose every 7 days.

Non-small cell lung cancer:

As single agent: 30 mg/m2 wkly as infusion over 20-30 minutes (after diluting in 125 ml normal saline or glucose 5%) or as slow bolus over 5-10 minutes (after diluting in 20-50 ml normal saline or glucose 5%). Delay subsequent doses if neutrophil count is <2000 cells/mm3 until recovery.
As combination therapy with cisplatin: 25-30 mg/m2 every 7 days.

Oral (Adult):

Non-small cell lung cancer: 60 mg/m2once wkly for 3 wk, may increase subsequently to 80 mg/m2 once wkly. If neutrophil count is < 500 cells/mm3 or between 500-1000 cells/mm3 on 2 separate occasions, keep dose at 60 mg/m2 for next 3 doses.

Interaction

Increased risk of granulocytopenia with cisplatin. Increased risk of neurotoxicity with paclitaxel, itraconazole, ketoconazole. Increased radiosensitising effects with prior or concomitant radiation therapy. Increased pulmonary toxicity with mitomycin. Increased myelotoxicity with zidovudine. Earlier onset and/or an increased severity of side effects with CYP3A inhibitors. Possible increase in vincristine levels with aprepitant. Possible infection with live vaccines.

Contraindications

Hypersensitivity to vinorelbine or other vinca alkaloids; severe current or recent infection (within last 2 wk); neutropenia; thrombocytopenia; severe hepatic impairment. Intrathecal admin. Do not give concomitantly with radiotherapy if liver is in treatment field. Pregnancy, lactation.

Side Effects

Neurotoxicity, peripheral paraesthesia, loss of deep tendon reflexes, abdominal pain, severe constipation, diarrhoea, alopecia, severe local irritation. Dose limiting granulocytopenia, leukopenia and anaemia. Intestinal obstruction, paralytic ileus, nausea, vomitinh, increased in LFT, chest pain, fatigue. Local pain and thrombophlebitis with repeated Inj.

Pregnancy And Lactation

Pregnancy Category D. There is positive evidence of human foetal risk, but the benefits from use in pregnant women may be acceptable despite the risk (e.g., if the drug is needed in a life-threatening situation or for a serious disease for which safer drugs cannot be used or are ineffective).

Precautions And Warnings

Hepatic impairment. Compromised bone marrow reserve due to prior irradiation or chemotherapy; recovering marrow function from the effects of previous chemotherapy. Prior radiation therapy; past history or pre-existing neuropathy. CBC with differentials to be monitored prior to admin of subsequent doses. Delay subsequent doses, if neutrophil count < 2000 cells/mm3. Each admin to be followed by at least 250 ml of normal saline to flush the vein. Avoid extravasation. If extravasation occurs, stop infusion immediately, and flush the vein with normal saline solution; admin the remaining solution in another vein. Do not father a child during and up to six mth after treatment and females of childbearing potential to use effective method of contraception during treatment and three mth thereafter. When admin orally, capsules must be swallowed whole with water and not chewed or sucked.

Therapeutic Class

Cytotoxic Chemotherapy.

Use in special populations

Hepatic Impairment:
Intravenous:

Cervical cancer: Dose adjustments may be needed.
Breast cancer, Ovarian cancer: Dose adjustments may be needed.
Non-small cell lung cancer: Massive liver metastases(>75% of liver volume replaced by the tumour): Decrease dose by 1/3. Bilirubin 2.1-3 mg/100 ml: Reduce IV dose by 50%. Bilirubin >3 mg/100 ml: Reduce IV dose by 75%.

Oral:

Massive liver metastases(>75% of liver volume replaced by the tumour): Decrease dose by 1/3. Bilirubin 2.1-3 mg/100 ml: Reduce IV dose by 50%. Bilirubin >3 mg/100 ml: Reduce IV dose by 75%.