Save up -80% on Topotecan
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2018 Price of Topotecan
Hycamtin 0.25 mg capsule
* price without discount in nearest pharmacy. Price may vary.
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Topotecan volume of distribution
Discount Cards 16,000+
Clients Benefit 29%
Total savings $4,735,080
Topotecan mechanism of action
Topotecan has the same mechanism of action as irinotecan and is believed to exert its cytotoxic effects during the S-phase of DNA synthesis. Topoisomerase I relieves torsional strain in DNA by inducing reversible single strand breaks. Topotecan binds to the topoisomerase I-DNA complex and prevents religation of these single strand breaks. This ternary complex interferes with the moving replication fork, which leads to the induction of replication arrest and lethal double-stranded breaks in DNA. As mammalian cells cannot efficiently repair these double strand breaks, the formation of this ternary complex eventually leads to apoptosis (programmed cell death). Topotecan mimics a DNA base pair and binds at the site of DNA cleavage by intercalating between the upstream (1) and downstream (+1) base pairs. Intercalation displaces the downstream DNA, thus preventing religation of the cleaved strand. By specifically binding to the enzymesubstrate complex, Topotecan acts as an uncompetitive inhibitor.
Dosage forms of Topotecan
|Capsule, hard||Oral use||0.25 mg|
Actavis Pharma Company
Humans and other mammals
Indication of Topotecan
For the treatment of advanced ovarian cancer in patients with disease that has recurred or progressed following therapy with platinum-based regimens. Also used as a second-line therapy for treatment-sensitive small cell lung cancer, as well as in combination with cisplatin for the treatment of stage IV-B, recurrent, or persistent cervical cancer not amenable to curative treatment with surgery and/or radiation therapy.
Toxicity of Topotecan
The primary anticipated complication of overdosage would consist of bone marrow suppression.
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