Oncology Drugs Flashcards

1
Q

What is the mechanism of action of Alkylating agents?

A

Cause intra- and inter-strand cross-links between DNA bases

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2
Q

What drugs are in the category of Alkylating agents?

A
Cyclophosphamide
Dacarbazine (DTIC)
Ifosfamide
Mechlorethamine
Melphalan
Nitrosureas
Procarbazine
Temozolamide
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3
Q

The metabolites of which Alkylating agents are toxic to the bladder and how can you protect against this toxicity?

A

Cyclophosphamide
Ifosfamide

Use hydration + MESNA

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4
Q

Which Alkylating agents penetrate the CNS?

A

Nitrosoureas
Procarbazine
Temozolamide

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5
Q

What Alkylating agent is the parent drug of the class?

A

Mechlorethamine - nitrogen mustard gas

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6
Q

What is the mechanism of action of the Platinum derivative drugs?

A

Cross-link DNA

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7
Q

What drugs are in the category of Platinum derivative drugs?

A

Carboplatin
Cisplatin
Oxaliplatin

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8
Q

For each of the Platinum derivative drugs (Carboplatin, Cisplatin, Oxaliplatin), rank the following toxicities in order from greatest to least:
Renal
Neuro
Heme

A
Carboplatin = Heme >>>> Renal/Neuro
Cisplatin = Renal > Neuro > Heme
Oxaliplatin = Neuro >> Heme >>>> Renal
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9
Q

What is the mechanism of action of Anti-tumor antibiotics?

A

Damage DNA physical structure by intercalating into DNA helix and alter DNA function by inhibiting RNA/protein synthesis

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10
Q

What drugs are in the category of Anti-tumor antibiotics?

A

Actinomycin D

Bleomycin

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11
Q

What cancer is Acitnomycin D a curative regimen for?

A

Pediatric cancers

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12
Q

What are toxicities of Acinomycin D?

A

Myelosuppression
Nausea/vomiting/diarrhea
Muscositis
Radiation recall

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13
Q

What are toxicities of Bleomycin?

A

Pulmonary and cutaneous toxicity, especially with decreased renal function
Can persist in lung and cause fatal recall of lung toxicity during surgery with high O2 inspired

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14
Q

Why does Bleomycin cause pulmonary and cutaneous toxicity, especially with decreased renal function?

A

Tissues clear it with bleomycin hydrolase - but lungs and skin lack this hydrolase
Therefore, if renal clearance of the drug is decreased, the drug can build up in lungs and skin, causing toxic effects

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15
Q

What is the mechanism of action of the Topoisomerase directed agents?

A

Forms a complex of the drug, enzyme, and DNA and the drug stabilizes the break, preventing repair and altering function

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16
Q

What are the Topoisomerase I directed agents?

A

Irinotecan

Topotecan

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17
Q

What are the Topoisomerase II directed agents?

A

Anthracyclines - Doxorubicin, Daunorubicin, Idarubicin
Mitoxantrone
Etoposide

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18
Q

What are toxicities of Irinotecan?

A
2 types of diarrhea
- Early = atropine sensitive
- Late = reflecting enterohepatic clearance
Myelosuppression
Nausea/Vomiting/Fatigue/Alopecia
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19
Q

What are toxicities of Topotecan?

A

Nausea/Vomiting/Fatigue/Alopecia

Myelosuppression

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20
Q

What are toxicities of anthracyclines (Doxorubicin, Daunorubicin, Idarubicin)?

A

Myelosuppression
Mucositis
Alopecia
Cardiac toxicity due to free radical generation (but Idarubicin less cardiotoxic)

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21
Q

How are the anthracyclines (Doxorubicin, Daunorubicin, Idarubicin) cleared and when must you dose adjust?

A

Cleared by liver

Adjust in hepatic failure

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22
Q

What drugs are in the category of antimetabolites?

A
Methotrexate
5-Fluorouracil
Cytaracine
Gemcitabine
Fludarabine
Mercaptopurine
Pentostatin
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23
Q

What is the mechanism of action of methotrexate?

A

Folate inhibitor

Inhibits dihydrofolate reductase, blocking DNA/RNA formation

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24
Q

What are the side effects of methotrexate?

A

At standard dose - myelosuppression, mucositis

At high doses - intentionally give lethal dose, but with leucovorin (to rescue normal cells)

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25
Q

What is the mechanism of action of 5-Fluorouracil?

A

Pyrimidine analog

Inhibits thymidine synthesis by forming complex with folate and thymidylate synthase

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26
Q

What are the side effects of 5-Fluorouracil?

A

Myelosuppression
GI
Cerebellar/neurocognitive
Rare coronary spasm

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27
Q

What can be used to enhance the toxicity of 5-FU to cancer cells?

A

Leucovorin

Enhances complex of thymidilate synthase + folate +5-FU

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28
Q

What is the mechanism of action of cytarabine (Ara-C) and Gemcitabine?

A

Cytosine analog

Inhibits DNA synthesis

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29
Q

What are the side effects of Cytarabine and Gemcitabine?

A

Myelosuppression
Cerebellar effects
Eye irritation
Hand/foot syndrome - prominent with gemcitabine

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30
Q

What antimetabolite drugs are the purine analogs?

A

Fludarabine

Mercaptopurine

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31
Q

What is the mechanism of action of pentostatin?

A

Behaves like a purine analog

Not incorporated into DNA directly, inhibits adenosine deaminase and signals apoptosis in T cells

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32
Q

What is the mechanism of action of asparaginase?

A

Clears circulation of asparagine

Decreases protein synthesis in susceptible cells types and indirectly damages DNA

33
Q

What are some side effects of asparaginase?

A

Hypersensitivity
Hyperglycemia
Pancreatitis
Altered clotting functions

34
Q

What is the mechanism of action of Hydroxyurea?

A

Reversible inhibition of ribonucleotide reductase by chelation of non-heme Fe
–> decreased dNTP pools –> stalled replication –> apoptosis

35
Q

What are some side effects of hydroxyurea?

A

Myelosuppression

Mucositis

36
Q

What are the microtubule directed cytotoxic agents?

A

Vincristine
Vinblastine
Paclitaxel
Dacitaxel

37
Q

What is the mechanism of action of vincristine and vinblastine?

A

Mitotic inhibitor - blocks mitosis

38
Q

What are the toxicities of vincristine and vinblastine?

A

Vincristine - neurotoxic > myelosuppression

Vinblastine - myelosuppression > neurotoxic

39
Q

What is the mechanism of action of Paclitaxel and Docitaxel (taxanes)?

A

Microtubule polymerstabilizers

Promote microtubule formation but are abnormal and shortened; do not function normally

40
Q

What are toxicities of Paclitaxel and Docitaxel?

A

Myelosuppression
Neuropathy
Fluid retention - vascular leak
Hypersensitivity reactions

41
Q

What is the mechanism of action of arsenical?

A

Generate free radicals

42
Q

What are side effects of arsenic?

A

Heavy metal toxicity - kidney, cardiac conduction (QT prolongation)

43
Q

What are the hormonal oncologics?

A
Goserelin
Tamoxifen
Letrozole
Examestane
Prednisone
44
Q

What is the mechanism of action of Goserelin?

A

LHRH analog

Decrease LH release by pituitary and decrease testosterone production

45
Q

What is the mechanism of action of Tamoxifen?

A

Estrogen receptor antagonist

46
Q

What is the mechanism of action of Letrozole?

A

Type II aromatase inhibitor

Non steroidal - target P450 aromatase

47
Q

What is the mechanism of action of Examestane?

A

Type I aromatase inhibitor

Steroidal - target substrate binding site

48
Q

What is the mechanism of action of prednisone?

A

Glucocorticoid receptor action induces apoptosis in lymphoid tissue

49
Q

What is the mechanism of action of tretinoin (all trans retinoic acid)?

A

Induces differentiations of leukemia cells bearing translocation t(15;17) that alters structure & function of retinoic acid

50
Q

What are side effects of all trans retinoic acid?

A

Teratogenic
Cutaneous (dry skin, ocular kaeratitis)
Increased intracranial pressure
Differentiation syndrome

51
Q

What is differentiation syndrome?

A

Cytokine storm in APL after all trans retinoic acid

Presents with fever, peripheral edema, pulmonary opacities, hypoxemia, respiratory distress, hypotension, etc.

52
Q

What drug should be given to control differentiation syndrome?

A

Dexamethasone (steroids)

53
Q

What drugs are in the category of tyrosine kinase inhibitors and what is the target for each?

A

Imatinib - BCR-ABL
Erlotinib - EGF receptor
Sorafenib - multitarget (VEGF, raf, others)
Sunitinib - multitarget (VEGF, raf, others)

54
Q

What are side effects of Imatinib?

A

Cytopenias
Liver abnormalities
Fluid retention
Rare cardiomyopathy

55
Q

What are side effects of Erlotinib?

A

Diarrhea

Cutaneous

56
Q

What are side effects of Sorafenib, Sunitinib?

A

Hypertension
Proteinuria
Clotting/bleeding

57
Q

What are side effects of Interferon?

A

Fatigue
Cytopenia
Fever, chills

58
Q

What is mechanism of action of Interleukin-2?

A

Induces T cell response, cytolytic for tumors

59
Q

What are side effects of Interleukin-2?

A

Hypotension
Vascular leak
Altered mental status
Cardiopulmonary effects

60
Q

What drugs are antibodies and what is their target?

A

Cetuximab - anti-EGFR
Trastuzumab - anti-Her2/neu
Rituximab - anti-CD20

61
Q

What are side effects of antibodies?

A

Infusion reaction = fever, chills, hypotension, bronchospasm

62
Q

What drug is an antiangiogenic agent?

A

Bevacuzimab

Anti-VEGF monoclonal antibody that prevents angiogenesis

63
Q

What are treatments of choice for AML?

A

High dose Cytarabine (Ara-C) and Danorubicin (anthrocycline)

64
Q

What are major side effects of AML treatment with Cytarabine and Danorubicin?

A

Tumor lysis syndrome
Cytarabine-induced cerebellar toxicity
Cardiomyopathy due to anthracycline

65
Q

What are treatments of choice for APL?

A

All trans retinoic acid, arsenic

66
Q

What are major side effects of APL treatment with all trans retinoic acid or arsenic?

A

Differentiation syndrome due to all trans retinoic acid

67
Q

What are treatments of choice for CML?

68
Q

What are major side effects of CML treatment with Imatinib?

A

Resistance to imatinib

69
Q

What are treatments of choice for ALL?

A

Asparaginase
Intrathecal chemo
PCP prophylaxis
Cryoprecipitate

70
Q

What are major side effects of ALL treatment with Asparaginase?

A

Allergic reaction, thrombosis, pancreatitis

71
Q

What are treatments of choice for CLL?

A

Wait and see

72
Q

What are treatments of choice for Hodgkin’s lymphoma?

A
ABVD combination chemo +/- radiation
A - Adriamycin (Doxorubicin)
B - Bleomycin
V - Vinblastine
D - Dacarbazine
73
Q

What are major side effects of Hodgkin’s treatment with ABVD?

A

Doxorubicin - cardiac toxicity
Bleomycin - pulmonary toxicity
Myelosuppression
Nausea/Fatigue/Vomiting

74
Q

What are treatments of choice for DLBCL (diffuse large B-cell lymphoma)?

A
R-CHOP +/- radiation
Rituximab (CD20 antibody)
Cyclophosphamide
Doxorubicin
Vincristine
Prednisone
75
Q

What are major side effects of treatment with R-CHOP?

A

Rituximab - infusion reaction
Cyclophosphamide - bladder toxicity, at high doses also cardiac toxicity and lung toxicity
Doxorubicin - cardiac toxicity
Vincristine - neurotoxicity, myelosuppression
Prednisone

76
Q

What are treatments of choice for follicular lymphoma?

A

Close surveillance
Treat if symptomatic
Drugs of choice are controversial

77
Q

What are treatments of choice for MALT lymphoma?

A

Triple therapy for H. pylori

78
Q

What are treatments of choice for T cell non-Hodgkin lymphoma?

A
CHOP
Cyclophosphamide
Doxorubicin
Vincritine
Prednisone
79
Q

What are treatments of choice for multiple myeloma?

A

Multiagent therapy with Bisphosphate therapy