Oxaliplatin

Brand Names: Oxaliplatin

Drug Class: Platinum-based Drug

Overview

11 DESCRIPTION Oxaliplatin is a platinum-based drug with the molecular formula C 8 H 14 N 2 O 4 Pt and the chemical name of cis -[(1 R ,2 R )-1,2-cyclohexanediamine- N,N '] [oxalato(2-)- O , O '] platinum. Oxaliplatin is an organoplatinum complex in which the platinum atom is complexed with 1,2-diaminocyclohexane (DACH) and with an oxalate ligand as a leaving group. The molecular weight is 397.3.

Mechanism of Action

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Oxaliplatin undergoes nonenzymatic conversion in physiologic solutions to active derivatives via displacement of the labile oxalate ligand. Several transient reactive species are formed, including monoaquo and diaquo DACH platinum, which covalently bind with macromolecules. Both inter- and intrastrand Pt-DNA crosslinks are formed. Crosslinks are formed between the N7 positions of two adjacent guanines (GG), adjacent adenine-guanines (AG), and guanines separated by an intervening nucleotide (GNG). These crosslinks inhibit DNA replication and transcription. Cytotoxicity is cell-cycle nonspecific. In vivo studies have shown antitumor activity of oxaliplatin against colon carcinoma.

Indications

  • 1 INDICATIONS AND USAGE Oxaliplatin Injection, in combination with infusional fluorouracil and leucovorin, is indicated for: adjuvant treatment of stage III colon cancer in patients who have undergone complete resection of the primary tumor. treatment of advanced colorectal cancer. Oxaliplatin Injection is a platinum-based drug used in combination with infusional fluorouracil and leucovorin, which is indicated for: adjuvant treatment of stage III colon cancer in patients who have undergone complete resection of the primary tumor. ( 1 ) treatment of advanced colorectal cancer. ( 1 )

Common Doses

  • 85 mg
  • 200 mg
  • 400 mg
  • 600 mg

Dosage

2 DOSAGE AND ADMINISTRATION Administer oxaliplatin 85 mg/m 2 as an intravenous infusion over 120 minutes concurrently with leucovorin over 120 minutes in separate bags, followed by fluorouracil on Day 1 of each 14-day cycle. Administer fluorouracil and leucovorin on Day 2 as recommended. ( 2.1 ) Adjuvant Treatment : Continue treatment for up to 12 cycles or unacceptable toxicity. ( 2.1 ) Advanced Colorectal Cancer : Continue treatment until disease progression or unacceptable toxicity. ( 2.1 ) 2.

Black Box Warning

WARNING: HYPERSENSITIVITY REACTIONS, INCLUDING ANAPHYLAXIS Serious and fatal hypersensitivity adverse reactions, including anaphylaxis, can occur with oxaliplatin within minutes of administration and during any cycle. Oxaliplatin is contraindicated in patients with hypersensitivity reactions to oxaliplatin and other platinum-based drugs [see Contraindications ( 4 )] . Immediately and permanently discontinue oxaliplatin for hypersensitivity reactions and administer appropriate treatment for management of the hypersensitivity reaction [see Warnings and Precautions ( 5.1 )].

Contraindications

  • 4 CONTRAINDICATIONS Oxaliplatin is contraindicated in patients with a history of a hypersensitivity reaction to oxaliplatin or other platinum-based drugs. Reactions have included anaphylaxis [see Warnings and Precautions ( 5.1 )] . History of hypersensitivity reaction to oxaliplatin or other platinum-based drugs. ( 4 , 5.1 )

Side Effects

  • 6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in labeling: Hypersensitivity Reactions [see Warnings and Precautions ( 5.1 )] Peripheral Sensory Neuropathy [see Warnings and Precautions ( 5.2 )] Severe Myelosuppression [see Warnings and Precautions ( 5.3 )] Reversible Posterior Leukoencephalopathy Syndrome [see Warnings and Precautions ( 5.4 )] Pulmonary Toxicity [see Warnings and Precautions ( 5.5 )] Hepatotoxicity [see Warnings and Precautions ( 5.6 )] QT Interval Prolongation and Ventricular Arrhythmias [see Warnings and Precautions ( 5.

Interactions

  • 7 DRUG INTERACTIONS 7.1 Drugs that Prolong the QT Interval QT interval prolongation and ventricular arrhythmias can occur with oxaliplatin [see Warnings and Precautions ( 5.7 )] . Avoid coadministration of oxaliplatin with medicinal products with a known potential to prolong the QT interval. 7.2 Use with Nephrotoxic Products Because platinum-containing species are eliminated primarily through the kidney, clearance of these products may be decreased by coadministration of potentially nephrotoxic compounds [see Clinical Pharmacology ( 12.3 )] .