♦Carboplatin



♦Carboplatin





(kar’-bo-pla-tin)

Paraplatin,

CBDCA

Pregnancy Category D


Mechanism of Action

Carboplatin is a cell cycle-nonspecific alkylating agent that prevents cell replication by producing intra- and inter-DNA cross-links.



Indications

Ovarian cancer (advanced) previously treated with other cyto-toxic agents, including cisplatin. Endometrial cancer, relapsed and refractory acute leukemia, metastatic seminoma, small cell lung cancer, squamous cell carcinoma of the head and neck.


Metabolism/Excretion

About 70% is excreted in the urine 24 hours after administration. Plasma half-life: 1.1 to 2.0 hours. Postdistribution half-life: 2.6 to 5.9 hours.


Dosage Range


Adult

♦ Single agent: 360 mg/m2 on day 1 given every 4 weeks. In general, the carboplatin dose should not be repeated until the neutrophil count is 2000/mm3 and the platelet count is ≥100,000/mm3.

♦ Combination with cyclophosphamide: 300 mg/m2 on day 1 IV every 4 weeks.

♦ Formula dosing: Another method for calculating the initial carboplatin dose is the use of a mathematical formula based on the pre-existing renal function and desired platelet nadir. This approach takes into account the pre-treatment renal function, which might be overlooked using the formula based on body surface. The formula, proposed by Calvert, is as follows:

Total dose (mg) = (target AUC) × (glomerular filtration rate + 25)

AUC (area under the curve) is obtained by plotting the plasma level of a drug over time and measuring the area beneath the plotted curve. Glomerular filtration rate has a good correlation to creatinine clearance. Therefore, this value is used in the calculation for carboplatin. The target area under the curve of 4 to 6 mg/mL/ min using carboplatin as a single agent is often used.

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Jul 20, 2016 | Posted by in ONCOLOGY | Comments Off on ♦Carboplatin

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