Oncology Part 2 Flashcards
anticipatory nausea/vomiting
learned response conditioned by severity and duration of previous emetic reactions from prior cycles of chemotherapy
acute nausea/vomiting
emetic response correlating with the administration of chemotherapy; usually within 24 hours of receiving chemotherapy
delayed nausea/vomiting
related to chemotherapy; usually occurs > 24 hours following completion of chemotherapy
breakthrough nausea/vomiting
occurs even if on scheduled anti-emetics prior to chemotherapy
refractory nausea/vomiting
persistent nausea/vomiting despite appropriate anti-emetics
pathophysiology of chemotherapy induced nausea/vomiting (CINV)
-begins in GI tract with cytotoxic chemotherapy inducing damage to epithelial cells lining GI tract
-enterochromaffin cells contain large stores of serotonin, which are released in massive quantities after exposure to chemotherapy
-serotonin activates chemoreceptor trigger zone (CTZ) which stimulates the vomiting center (located in nucleus tractus solitarii in medulla)
nausea
inclination to vomit or a feeling in the throat or epigastric region alerting an individual that vomiting is imminent
wretching
labored movement of abdominal and thoracic muscles before vomiting
vomiting
ejection or forced expulsion of gastric contents through the mouth
neurotransmitters involved in CINV
-dopamine
-histamine
-acetylcholine
-serotonin
-substance P
levels of emetogenic risk
-highly emetogenic (>90% frequency of emesis; level 5)
-moderately emetogenic (>30-90% frequency of emesis; level 3-4)
-low emetic risk (10-30% frequency of emesis; level 2)
-minimal emetic risk (<10% frequency of emesis; level 1)
What levels of emetogenic risk contribute to the emetogenicity of the chemotherapy regimen?
≥ level 3
risk factors for CINV
-female
-children
-prior history of motion sickness, morning sickness, and/or CINV
-anxiety/high pre-treatment anticipation of nausea
What can be a protective factor for CINV?
chronic alcohol use
How is the medication regimen for prophylaxis of acute nausea/vomiting determined?
emetogenic potential of chemotherapy
What drug class can be substituted for each other for prophylaxis of acute nausea/vomiting?
5-HT3 receptor antagonists
What are the four drug classes that can be included in a highly emetogenic CINV regimen?
-NK-1 antagonist
-steroid
-5-HT3 antagonist
-atypical antipsychotic
What two drug classes are always included in a CINV medication regimen?
-steroid
-5-HT3 antagonist
What is the suffix of NK-1 antagonists?
-pitant
What steroid is used for CINV?
dexamethasone
What is the suffix of 5-HT3 antagonists?
-setron
What atypical antipsychotic is used for CINV?
olanzapine
What two drug classes can be added to a CINV medication regimen for toxicities?
-benzodiazepine
-H2 blocker/proton pump inhibitor
What benzodiazepine can be added to a CINV medication regimen for toxicities?
lorazepam
How many medications are in a low emetogenic CINV regimen?
one
What drug classes are used to treat breakthrough nausea/vomiting?
-dopamine receptor antagonists
-phenothiazines
-antipsychotic
-benzodiazepine
-cannabinoids
-serotonin antagonists
-steroid
-anticholinergic
What dopamine receptor antagonists are used to treat breakthrough nausea/vomiting?
-haloperidol
-metoclopramide
What phenothiazines are used to treat breakthrough nausea/vomiting?
-prochlorperazine
-promethazine
What cannabinoids are used to treat breakthrough nausea/vomiting?
-dronabinol
-nabilone
What anticholinergic is used to treat breakthrough nausea/vomiting?
scopolamine
What drug classes are typically used to treat delayed nausea/vomiting?
-steroid
-NK-1 antagonist
-atypical antipsychotic
What are the treatment options for anticipatory nausea/vomiting?
-prophylaxis
-behavioral therapy
-acupuncture/acupressure
-benzodiazepine
What are the treatment guidelines for radiation induced emesis?
-start pre-treatment for each day of radiation therapy
-5-HT3 antagonist (PO) +/- dexamethasone
common toxicities for 5-HT3 antagonists
-headache
-asymptomatic and transient ECG changes
-constipation
-increased transaminases
How can headaches due to 5-HT3 antagonists be addressed?
switch to another 5-HT3 antagonist
common toxicities for corticosteroids
-anxiety
-euphoria
-insomnia
-hyperglycemia
-increased appetite (weight gain)
common toxicities for NK-1 antagonists
-hiccups
-drug interactions
common toxicities for dopamine antagonists
-extrapyramidal side effects
-diarrhea
-sedation
common toxicities for atypical antipsychotics
-dystonic reactions
-sedation
common toxicities for phenothiazines
-sedation
-akathisia
-dystonia
-tissue damage (IV promethazine)
common toxicities for cannibanoids
-drowsiness
-dizziness
-euphoria
-mood changes
-hallucinations
-increased appetite
common toxicities for benzodiazepines
-sedation
-hypotension
-urinary incontinence
-hallucinations
common toxicities for anticholinergics
-vision problems
-inability to urinate
-xerostomia
-constipation
When are anti-emetics most effective?
at least 5-30 minutes before chemotherapy as prophylaxis
What should always be provided to patients after chemotherapy?
PRN anti-emetics for at home use
When does the onset of mucositis usually occur?
5-7 days after chemotherapy
When does mucositis improve?
increase of neutrophil count
What type of chemotherapy is most likely to cause mucositis?
continuous infusions
What drugs are most likely to cause mucositis?
-anthracyclines
-5-fluorouracil (5-FU)
risk factors for mucositis
-pre-existing oral lesions
-poor dental hygiene or ill-fitting dentures
-combined modality treatment (i.e., chemotherapy and radiation)
diet recommendations for mucositis
-avoid rough food, spices, salt, and acidic fruit
-eat soft or liquid foods, non-acidic fruit, soft cheeses, and eggs
-avoid smoking, alcohol, and OTC mouthwash
What patients should receive pre-treatment dental screening?
-radiation therapy to oral mucosa
-high-dose chemotherapy with bone marrow transplant
What are general mouth care strategies to prevent mucositis?
-baking soda rinses 2-4 times daily
-soft-bristled toothbrush to minimize gingival irritation
-saliva substitute for radiation-induced xerostomia
What are the treatment options for pain management of mucositis?
-topical anesthetics
-oral cryotherapy
-sucralfate
-oral and parenteral opioid analgesics
clinical pearls of topical anesthetics for pain management of mucositis
-short-term effects
-various combinations of lidocaine, diphenhydramine, and antacids (magic mouthwash)
-swish and spit (or swallow) every few hours PRN
clinical pearls of oral cryotherapy for pain management of mucositis
-vasoconstriction may decrease chemotherapy delivery to oropharyngeal mucosa
-use ice chips 30 minutes before chemotherapy
clinical pearls of sucralfate for pain management of mucositis
-forms protective barrier
-swish and swallow
-taste and texture may be nauseating
clinical pearls of oral and parenteral opioid analgesics for pain management of mucositis
-moderate to severe mucositis
-oral solutions may contain high concentrations of alcohol, which burns
-use of patient-controlled analgesia (PCA) pump is common
decreased white blood cells (WBC)
-neutropenia
-leukopenia
-granulocytopenia
decreased platelets
thrombocytopenia
decreased red blood cells (RBC)
anemia
What is the most common dose-limiting toxicity of chemotherapy?
bone marrow suppression
nadir
lowest value blood counts fall to during cycle of chemotherapy
When does the onset of neutropenia usually occur?
10-14 days after chemotherapy administration
When does neutropenia usually recover by?
3-4 weeks after chemotherapy
What are the lab values necessary in order for chemotherapy to be administered?
-WBC > 3x10^3/uL OR
-absolute neutrophil count (ANC) > 1.5x10^3/uL AND
-platelet count ≥ 100x10^3/uL
severe neutropenia lab value
ANC < 0.5x10^3/uL
febrile neutropenia
severe neutropenia with single oral temperature > 101ºF OR ≥ 100.4ºF for at least 1 hour
neutropenia presentation
fever with no other s/s of infection
primary prophylaxis of neutropenia guidelines
-if patient is to receive chemotherapy expected to cause ≥ 20% incidence of febrile neutropenia
-high risk patients
What patients are defined as high risk for primary prophylaxis of neutropenia?
-pre-existing neutropenia due to disease
-extensive prior chemotherapy
-previous radiation to pelvis or other areas containing large amounts of bone marrow
secondary prophylaxis of neutropenia guidelines
use colony stimulating factor (CSF) preventively with next cycle of chemotherapy
What are other uses for CSFs?
-dose-dense chemotherapy
-alone or with plerixafor after chemotherapy to mobilize peripheral blood progenitor cells
-stem cell transplant
CSF drugs
-filgrastim
-pegfilgrastim
route and frequency of administration for filgrastim
SQ QD
clinical pearls of pegfilgrastim
-pegylated molecule
-longer half-life than filgrastim
-more expensive
-non-linear PK
-self-injector available
What drug is not a biosimilar to filgrastim but works through a similar mechanism of action?
tbo-filgrastim (Granix)
What drugs are biosimilars to filgrastim?
-filgrastim-sndz (Zarxio)
-filgrastim-aafi (Nivestym)
-filgrastim-ayow (Releuko)
dosing recommendations for filgrastim
-start up to 3-4 days after chemotherapy
-continue until post-nadir ANC recovers to at least near normal levels
dosing recommendations for pegfilgrastim
-start at least 24 hours after chemotherapy
-can be administered up to 3-4 days after chemotherapy
-leave at least 14 days between dose and next cycle of chemotherapy
CSF adverse effects
-flu-like symptoms
-bone, joint, and/or musculoskeletal pain
-deep vein thrombosis (DVT)
-splenic enlargement (long-term use)
What medications can be used to treat bone, joint, and/or musculoskeletal pain due to CSF use?
-acetaminophen
-non-opioid analgesics
-loratidine
When are platelet transfusions indicated for thrombocytopenia?
-≤ 10x10^3/uL (varies by institution)
-active bleeding
-before surgical procedures
causes of anemia
-decreased RBC production
-decreased erythropoietin production
-decreased vitamin B12, iron, or folic acid
-blood loss
When should patients undergo a work-up for chemotherapy induced anemia?
-hemoglobin (Hgb) ≤ 11 g/dL OR
-≥ 2 g/dL drop from baseline
chemotherapy induced anemia symptomatic patient treatment guidelines
-transfuse as indicated
-consider use of erythropoietic stimulating agents (ESAs)
-perform iron studies
What drug class has a black box warning for use in cancer patients?
ESAs
When should ESAs not be used in patients with chemotherapy induced anemia?
-myelosuppressive chemotherapy with curative intent
-not receiving chemotherapy
-non-myelosuppressive chemotherapy
When should ESAs be considered for use in patients with chemotherapy induced anemia?
-cancer and chronic kidney disease (CKD)
-palliative chemotherapy
-no other identifiable causes
What is the frequency of administration of epoetin alfa?
weekly
What is the benefit of darbepoetin vs. epoetin alfa?
prolonged half-life
darbepoetin indication for cancer
chemotherapy induced anemia due to chemotherapy of non-myeloid malignancies
Which cancer patients on ESA therapy should have baseline iron studies performed?
all
What chemotherapies cause myalgias/arthralgias?
-taxanes
-aromatase inhibitors
What is the recommended treatment of myalgias/arthralgias due to chemotherapy?
-NSAIDs
-opioids (if necessary)
What chemotherapies cause hemorrhagic cystitis?
-high dose cyclophosphamide
-ifosfamide
What is the recommended treatment of hemorrhagic cystitis due to chemotherapy?
-hydration
-mesna
What chemotherapies cause heart failure?
-anthracyclines
-high-dose cyclophosphamide
-HER2 targeted therapies (i.e., trastuzumab)
What is the recommended treatment of heart failure due to chemotherapy?
-monitor cumulative dose
-assess for risk factors
-dexrazoxane
What chemotherapies cause peripheral neuropathy?
-taxanes
-vinca alkaloids
-platinums
What is the recommended treatment of peripheral neuropathy due to chemotherapy?
-change infusion rates
-adjunctive pain medications (i.e., gabapentin, amitriptyline)
What chemotherapy causes pulmonary toxicities?
bleomycin
What is the recommended treatment of pulmonary toxicities due to chemotherapy?
corticosteroids
acute type I chemotherapy related cardiac dysfunction
-occurs immediately after single dose or course of therapy with anthracycline
-uncommon
-not related to cumulative dose
chronic type I chemotherapy related cardiac dysfunction
-onset usually within 1 year of anthracycline therapy
-need to discontinue anthracycline
-common and life-threatening
-related to cumulative dose
What are symptoms of chronic type I chemotherapy related cardiac dysfunction?
-tachycardia
-tachypnea
-exercise intolerance
-pulmonary and venous congestion
-ventricular dilation
-poor perfusion
-pleural effusion
late onset type I chemotherapy related cardiac dysfunction
-develops several years after therapy
-manifests as ventricular dysfunction, congestive heart failure (CHF), conduction disturbances, and arrhythmias
-more common in pediatric cancer patients who received anthyracyclines
What does the risk of cardiotoxicity depend on when administering chemotherapy?
cycles of chemotherapy
What drug causes type II chemotherapy related cardiac dysfunction?
trastuzumab
type II chemotherapy related cardiac dysfunction
-not dose-related
-ranges widely in severity
-not associated with cardiac damage
-REVERSIBLE (can restart therapy)
OPQRSTU
-Onset
-Provoking factors
-Quality
-Radiation
-Severity
-Time
-Understanding
assessment of pain questions
-What other symptoms do you have associated with pain?
-What are your bowel movements?
-What medications have you used in the past?
-What medication allergies do you have?