Chemotherapy and Biologic Therapy Flashcards
Components of Drug Effect with Chemotherapy
Drug Concentration x Duration of Exposure
How is Dosage Calculated for chemotherapy?
Milligrams per meter squared of body surface area
Definition of Area Under the Curve
attenuate doses based on functional or induced impairment of body systems
Definition of Complete response to Chemotherapy treatment
Disappearance of all evidence of tumor
Definition of Partial response to chemotherapy treatment
a 50% reduction in the cross product of measurable lesions and absence of any new disease
Definition of Cell Cycle Specific Chemo agents
Depend on proliferative capacity of cells and phase of cells.
Chemotherapy agents that work in DNA synthesis (S) phase
Antimetabolites: Methotrexate, Gemcitabine
Chemotherapy agents that work in the mitotic phase (M) phase
Alkaloids: Taxanes, Topotecan, Etoposide, Vincristine
Definition of Cell Cycle non specific Chemo agents
acts in all phases of the cell cycle, not dependent on proliferative capacity
Classes of cycle non specific chemo agents
Platinum agents, Antibiotics, Alkylating agents
Common Platinum agents
Cisplatin, carboplatin
Antibiotics used in Chemotherapy regimens
Doxorubicin, Bleomycin
Common Alkylating agents
Cyclophosphamide, Ifosfamide
Methotrexate: Mechanism of action
Active during S phase, Combines with dihydrofolate reductase. Inhibits conversion of di-hydrofolate to tetrahydrofolate
Methotrexate: Toxicities
Mucositis, Myelosupression, Liver and renal impairment
Methotrexate: Uses
GTN, Breast cancer`
Gemcitabine: Mechanism of action
Active during S phase
Gemcitabine: Toxicities
Myelosupression
Gemcitabine: Uses
Ovarian Cancer
Paclitaxel: Mechanism of action
Active in M phase. Stabilization of micro tubular aparatus, cells die in metaphase arrest
Paclitaxel: Toxicities
Hypersensitivity reaction, Dysrhythmias, alopecia, neuropathy, myelosupression
Paclitaxel: Dose limiting toxicity
Myelosupression