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Temozolomide

Non-platinum based Alkylating Agents

MECHANISM OF ACTION

Temozolomide is a prodrug which is rapidly and nonenzymatically converted to the active alkylating metabolite MTIC [(methyl-triazene-1-yl)-imidazole-4-carboxamide]; this conversion is spontaneous, nonenzymatic, and occurs under physiologic conditions in all tissues to which it distributes . The cytotoxic effects of MTIC are manifested through alkylation (methylation) of DNA at the O6, N7 guanine positions which lead to DNA double strand breaks and apoptosis. Temozolomide is noncell cycle specific

MECHANISM OF KIDNEY INJURY

n/a

CLINICAL KIDNEY SYNDROME

BLE edema, urinary incontinence, increased urinary frequency

CARDIOVASCULAR ADVERSE EFFECTS

LYTE ABNORMALITIES

Hypercorticoidism, hepatotoxic, weight gain/edema

RISK FACTORS

n/a

MITIGATION STRATEGIES

n/a

SUGGESTIONS 

Dose adjustment (details in notes section below), dose adjustment based on ANC and platelet counts

NOTES/COMMENTS

PHARMACOKINETICS

Molecular Weight

Volume of Distribution

Plasma Protein Binding

Metabolism

Bioavailability

Half-life elimination

Time to peak

Excretion

Urine (~38%; parent drug 6%;); feces <1%.

Dialyzable?

Unknown

REF:

PATHOLOGY SLIDES:

ENTRY UPDATES:

Kartik Kalra

United States

Sep 25, 2022

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