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Cancer Therapy
Drugs
38
Medical
Graduate
12/01/2013

Additional Medical Flashcards

 


 

Cards

Term
How is modern cancer therapy evolving
Definition
  • Protocol directed 
  • Adjust for the most specific diagnosis 
  • Offer when clinical trials are accessable and needed 
Term
What are the "tools of the trade" for oncology
Definition
  • Cytotoxic chemo (2 or more agents in combination)
  • Specific molecular targets
  • Block transcription factors
  • Tyrosine kinase inhibitors
  • Cyto-differentiating agents
  • Anti-angiogenic agents 
  • Immmune modulators (active and passive)
  • Hormonal agents 
  • Marrow/stem cell transplantations (auto vs allogenic
Term
Anti-metabolite agents
Definition
  • Methotrexate (MTX)
  • Mercaptopurine (6-MP)
  • Thioguanine (6-TG)
  • Cytarabine (Ara-C)
  • Cladribine (2-CdA) 

***These are all cycle specific for the S-phase***

Term

Methotrexate 

 

MOA

Drug interactions

Definition

MOA:  

  • Interferes with folate metabolism
  • Polyglutamated intra-cellular function 
  • Cycle cycle specific for S-phase

Drug interactions:

  • NSAIDs
  • Penicillin 
  • Bactrim 
Term
Methotrexate toxicity
Definition
  • Myelosuppression
  • GI problems -DLSE (mucositis, diarrhea) 
  • Renal problems (prevention of alkalinization and hydration)
  • Hepatitis 
  • CNS 
Term

Methotrexate overdose treatment

 

Treatment protocol

MOA

Definition

Leucovorin 

 

  • Used when doses of methotrexate are > 200 mg/m2
  • Provies reduced folate to cells to resume purine synthesis 
  • Give doses of 5-15 mg/m2 orally (po)/IV every (q) 3-6 hours for 3-9 doses 
  • Continue until levels of MTX are < 0.2 uM or per protocol 
  • doses of > 25 mg MUST be given IV 
Term
Leucovorin
Definition
Treatment for methotrexate intoxication
Term

Mercaptopurine 

 

MOA

Toxicity 

 

Definition

MOA:

  • Incorporated into DNA and RNA
  • Blocks synthesis (S-phase)
Toxicity:
  • Myelosuppression (mild)
  • GI (mild)
  • Hepatitis 
Term

Thioguanine

 

MOA

Toxicity

Definition

MOA:

  • Incorporates into DNA and RNA
  • Blocks purine synthesis (S-phase)

Toxicity:

  • Myelosuppression (DLSE
  • GI (mild) 
  • Hepatitis (rare) 
Term

Cytarabine 

 

MOA

 

Definition
MOA:
  • Arabinose nucleoside analogue of deoxycytidine 
  • Interferes with DNA replication and repair by inhibiting DNA polymerase and incorporating into DNA (S-phase)

 

Term

Cytarabine 

 

Toxicity

Definition
  • Myelosuppression
  • Skin (palmar-plantar erythema 
  • Hepatitis
  • GI (mucositis, diarrhea) 
  • CNS (confusion, seizures, tremors)
  • Ocular (conjunctivitis w/higher doses) 
  • Fever 
  • Malaise 
Term
Alkylating agents
Definition
  • Cyclophosphamide (CTX)
  • Ifosfamide (IFX, ifos)
  • Cisplatin (CDDP)
  • Carboplatin (CBDCA)

***These are non-cell cycle specific***

Term

Cyclophosphamide 

 

MOA

Definition
  • Cross-linking alkylation 
  • Non-cell cycle specific 
Term

Cyclophosphamide 

 

Toxicity

Definition
  • Hemorrhagic cystitis (MESNA, hydration
  • GI
  • SIADH (furosemide and NS
  • Cardiac (with doses > 100 mg/kg)
  • Meylosuppression (DLSE)
  • Secondary leukemia 
Term

Ifosfamide 

 

MOA

 

Definition
  • Cross-linking alkylation
  • Non-cell cycle specific 
Term

Ifosfamide 

 

Toxicity

Definition
  • Hemorrhagic cystitis (DLSE, MESNA, hydration)
  • Renal (electrolyte wasting) 
  • CNS
  • Myelosuppression
  • GI 
Term

Cisplatin 

 

MOA

Definition
  • Cross-linking platination
  • Non-cycle specific 
Term

Cisplatin 

 

Toxicity 

Definition
  • Renal (DLSE, hydration, mannitol, amifostine, electrolyte wasting)
  • GI (n/v delayed)
  • Neurotoxicity (peripheral neuropathy, hearing loss)
  • Myelosuppression 
Term
Anti-tumor antibiotics
Definition

Anthracyclines:

  • Doxorubicin 
  • Daunorubicin 
  • Idarubicin 
  • Mitoxantrone 
Others:
  • Dactinomycin
  • Belomycin 
 ***These are non-cell cycle specific***
Term

Doxorubicin

 

MOA

Definition
  • Intercalation b/t base pairs in DNA double helix 
  • Free radical generation 
  • Forms complexes w/ iron or copper (which might explain the cardiac toxicity-dexrazoxane)
  • Inhibition of topoisomerase-I and II

***non-cell cycle specific***

Term

Doxorubicin 

 

Toxicity

Definition
  • Myelosuppression (DLSE)
  • Vesicant (dexrazoxone and cool compress
  • Cardiac (cardiomyopathy)
  • Radiosensitizer (radiation recall)
  • GI (mucositis)
Term

Bleomycin

 

dosage protocol

Usage

Definition
  • 1 unit = 1 mg
  • Maximal lifetime dose = 400 units 
  • Used for causing sclerosis:  60-240 units are placed w/in the cavity...may add lidocaine to reduce local discomfort
Term
Bleomycin toxicity
Definition
  • Cardiovascular (raynaud's phenomenon
  • Dermatologic:  Palmar and plantar erythema, desquamation, hyperpigmentation
  • Mucositis 
  • Pulmonary fibrosis 
  • Fever, chills, confusion, anaphylaxis (delayed several hours) 
Term
Irinotecan
Definition

***Aka camptothecin***

 

MOA:

  • Inhibition of topoisomerase-I
Term

Irinotecan (camptothecin) 

 

Side effects

Management of SE 

Definition

Diarrhea:

  • Early diarrhea (during infusion or several hours after): Give either atropine or loperamide 
  • Late diarrhea (> 24 hours after infusion):  Give either loperamide or octreotide 
Term

Plant alkaloids 

 

 

Definition
  • Vincristine (VCR)
  • Etoposide (VP-16)
  • Teniposide (VM-26) 

***These are cell cycle specific***

Term

Vincristine 

 

MOA

Definition
  • Derived from periwinkle plant
  • Inhibition of mitosis by binding to tubulin in the S-phase 
Term

Vincristine 

 

Toxicity

Definition
  • Neurotoxicity (DLSE, jaw pain, foot drop, constipation, parayltic ileus) 
  • Lethal if given IT (ascending paralysis + death) 
  • Vesicant (warm compress and notify doctor) 
Term

Etoposide 

 

MOA

Definition
  • Topoisomerase-II inhibitor 
  • Cell-cycle specific 
Term
Etoposide Toxicity
Definition
  • Myelosuppression (DLSE)
  • GI (mucositis w/higher doses) 
  • Anaphylaxis 
  • Irritant if extravasated
  • Hypotension (infusion rate related)
  • Secondary malignancies 
Term

Asparaginase 

 

MOA

Definition
  • Enzyme that acts indirectly to inhibit protein synthesis in certain tumor cells
  • Depends on exogenous asparagine, which is a non-essential amino acid in humans 
Term
What is the availability of asparaginase
Definition
  • E. coli 
  • Erwinia 
  • Pegaspargase 
Term

Asparaginase 

 

Toxicity

Definition
  • Anaphylaxis 
  • Pancreatitis
  • Coagulopathy 
  • GI (mild) 
Term

Rituximab 

 

MOA

Dose

Definition

MOA:

  •  Anti-CD20 monoclonal Ab
  • Binds to CD20 on B-lymphocytes which activates complement-dependent cytotoxicity 
Dose:
  • 375 mg/m2 1-3X weekly 
Term

Rituximab 

 

Toxicity

Definition
  • Infusion related:  Bronchospasm and hypotension.  Fever and chills 
  • Luekopenia
  • Consider pre-med w/acetaminophen and diphenhydramine 
  • Administration rate will depend on protocol 
Term

Imatinib 

 

MOA

Definition
  • Inhibition of BCR-ABL tyrosine kinase 
  • Blocks proliferation and induces apoptosis in BCR-ABL positive cell lines
Term

Dose for imatinib

Availabilit

Definition
  • Dose = 260 mg/m2/day (may go up to 340)
  • Round dose to the nearest 50 mg

Available in dosease of 100mg or 400 mg tablets

Term
Imatinib toxicity
Definition
  • Fatigue/dizziness/insomnia
  • Rash 
  • Itching
  • Fluid retention (edema, ansarca, ascites, effusions, pulmonary edema) 
  • Muscle cramps, arthralgias, myalgias
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