indication

Teniposide is used for the treatment of refractory acute lymphoblastic leukaemia

pharmacology

Teniposide is a phase-specific cytotoxic drug, acting in the late S or early G 2 phase of the cell cycle, thus preventing cells from entering mitosis. Teniposide causes dose-dependent single- and double-stranded breaks in DNA and DNA: protein cross-links.

mechanism of action

The mechanism of action appears to be related to the inhibition of type II topoisomerase activity since teniposide does not intercalate into DNA or bind strongly to DNA. Teniposide binds to and inhibits DNA topoisomerase II. The cytotoxic effects of teniposide are related to the relative number of double-stranded DNA breaks produced in cells, which are a reflection of the stabilization of a topoisomerase II-DNA intermediate.

half life

5 hours

route of elimination

From 4% to 12% of a dose is excreted in urine as parent drug. Fecal excretion of radioactivity within 72 hours after dosing accounted for 0% to 10% of the dose.

drug interactions

Amprenavir: The strong CYP3A4 inhibitor, Amprenavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Amprenavir is initiated, discontinued or dose changed.

Atazanavir: The strong CYP3A4 inhibitor, Atazanavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Atazanavir is initiated, discontinued or dose changed.

Butabarbital: Barbiturates like butabarbital may decrease the serum concentration of Teniposide. arbiturates may decrease the serum concentration of Teniposide.

Butalbital: Barbiturates such as butalbital may decrease the serum concentration of teniposide. Consider alternatives to combined treatment with barbiturates and teniposide due to the potential for decreased teniposide concentrations. If the combination cannot be avoided, monitor teniposide response closely.

Clarithromycin: The strong CYP3A4 inhibitor, Clarithromycin, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Clarithromycin is initiated, discontinued or dose changed.

Conivaptan: The strong CYP3A4 inhibitor, Conivaptan, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Conivaptan is initiated, discontinued or dose changed.

Darunavir: The strong CYP3A4 inhibitor, Darunavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Darunavir is initiated, discontinued or dose changed.

Delavirdine: The strong CYP3A4 inhibitor, Delavirdine, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Delavirdine is initiated, discontinued or dose changed.

Fosamprenavir: The strong CYP3A4 inhibitor, Fosamprenavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Fosamprenavir is initiated, discontinued or dose changed.

Imatinib: The strong CYP3A4 inhibitor, Imatinib, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Imatinib is initiated, discontinued or dose changed.

Indinavir: The strong CYP3A4 inhibitor, Indinavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Indinavir is initiated, discontinued or dose changed.

Isoniazid: The strong CYP3A4 inhibitor, Isoniazid, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Isoniazid is initiated, discontinued or dose changed.

Itraconazole: The strong CYP3A4 inhibitor, Itraconazole, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Itraconazole is initiated, discontinued or dose changed.

Ketoconazole: The strong CYP3A4 inhibitor, Ketoconazole, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Ketoconazole is initiated, discontinued or dose changed.

Lopinavir: The strong CYP3A4 inhibitor, Lopinavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Lopinavir is initiated, discontinued or dose changed.

Miconazole: The strong CYP3A4 inhibitor, Miconazole, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Miconazole is initiated, discontinued or dose changed.

Natalizumab: The immunosuppressant, Teniposide, may increase the adverse effects of Natalizumab. Increased risk of Progressive Multifocal Leukoencephalopathy (PML) and other infections. Concurrent therapy should be avoided.

Nefazodone: The strong CYP3A4 inhibitor, Nefazodone, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Nefazodone is initiated, discontinued or dose changed.

Nelfinavir: The strong CYP3A4 inhibitor, Nelfinavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Nelfinavir is initiated, discontinued or dose changed.

Nicardipine: The strong CYP3A4 inhibitor, Nicardipine, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Nicardipine is initiated, discontinued or dose changed.

Posaconazole: The strong CYP3A4 inhibitor, Posaconazole, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Posaconazole is initiated, discontinued or dose changed.

Quinidine: The strong CYP3A4 inhibitor, Quinidine, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Quinidine is initiated, discontinued or dose changed.

Quinupristin: This combination presents an increased risk of toxicity

Ritonavir: The strong CYP3A4 inhibitor, Ritonavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Ritonavir is initiated, discontinued or dose changed.

Saquinavir: The strong CYP3A4 inhibitor, Saquinavir, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Saquinavir is initiated, discontinued or dose changed.

Telithromycin: The strong CYP3A4 inhibitor, Telithromycin, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Telithromycin is initiated, discontinued or dose changed.

Trastuzumab: Trastuzumab may increase the risk of neutropenia and anemia. Monitor closely for signs and symptoms of adverse events.

Voriconazole: The strong CYP3A4 inhibitor, Voriconazole, may decrease the metabolism and clearance of Teniposide, a CYP3A4 substrate. Consider alternate therapy or monitor for changes in the therapeutic/adverse effects of Teniposide if Voriconazole is initiated, discontinued or dose changed.