Mosby's 2014 Nursing Drug Reference (313 page)

BOOK: Mosby's 2014 Nursing Drug Reference
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Canada only   Side effects:
italics
= common;
bold
= life-threatening   
Nurse Alert

pegfilgrastim (Rx)

(peg-fill-grass′stim)

Neulasta

Func. class.:
Hematopoietic agent

Chem. class.:
Granulocyte colony-stimulating factor

ACTION:

Stimulates proliferation and differentiation of neutrophils

USES:

To decrease infection in patients receiving antineoplastics that are myelosuppressive; to increase WBC count in patients with product-induced neutropenia

CONTRAINDICATIONS:

Hypersensitivity to proteins of
Escherichia coli
, filgrastim

Precautions:
Pregnancy (C), breastfeeding, children <45 kg, adolescents, myeloid malignancies, sickle cell disease, leukocytosis, splenic rupture, ARDS, allergic-type reactions, peripheral blood stem cell (PBSC) mobilization

DOSAGE AND ROUTES
Calculator

• Adult:
SUBCUT
6 mg, give 1× per chemotherapy cycle

Available forms:
Sol for inj 6 mg/0.6 ml

Administer:
SUBCUT route

• 
Using single-use vials; after dose is withdrawn, do not reenter vial

• 
Do not use 6-mg fixed dose in infants, children, or others <45 kg

• 
Inspect sol for discoloration, particulates; if present, do not use

• 
Do not administer during the period 14 days before and 24 hr after cytotoxic chemotherapy

SIDE EFFECTS

CNS:
Fever, fatigue, headache, dizziness, insomnia, peripheral edema

GI:
Nausea
, vomiting, diarrhea, mucositis, anorexia, constipation, dyspepsia, abdominal pain, stomatitis,
splenic rupture

HEMA:
Leukocytosis, granulocytopenia, sickle cell crisis, hemoglobin S disease with crisis

INTEG:
Alopecia

MISC:
Chest pain, hyperuricemia,
anaphylaxis, influenza-like illness, angioedema, antibody formation

MS:
Skeletal pain

RESP:
Respiratory distress syndrome

PHARMACOKINETICS

Half-life: 15-80 hr; 20-38 hr (children)

INTERACTIONS

• 
Do not use product concomitantly, 2 wk before, or 24 hr after administration of cytotoxic chemotherapy

Increase:
release of neutrophils—lithium

Drug/Lab Test

Increase:
uric acid, LDH, alk phos

NURSING CONSIDERATIONS
Assess:

 
Allergic reactions, anaphylaxis:
rash, urticaria; discontinue product, have emergency equipment nearby

 
ARDS:
dyspnea, fever, tachypnea, occasionally confusion; obtain ABGs, chest x-ray; product may need to be discontinued

• 
Bone pain;
give mild analgesics

• 
Blood studies: CBC with differential, platelet count before treatment, 2× weekly; neutrophil counts may be increased for 2 days after therapy

• 
B/P, respirations, pulse before and during therapy

Perform/provide:

• 
Storage in refrigerator; do not freeze; may store at room temp up to 6 hr; avoid shaking, protect from light

Evaluate:

• 
Therapeutic response: absence of infection

Teach patient/family:

• 
How to perform the technique for self-administration if product to be given at home: dose, side effects, disposal of containers and needles; provide instruction sheet

• 
To notify prescriber immediately of allergic reaction, trouble breathing, abdominal pain

Canada only   Side effects:
italics
= common;
bold
= life-threatening   
Nurse Alert

peginterferon alfa-2a (Rx)

(peg-in-ter-feer′on)

Pegasys

peginterferon alfa-2b (Rx)

PegIntron, SYLATRON

Func. class.:
Immunomodulator

ACTION:

Stimulates genes to modulate many biologic effects, including the inhibition of viral replication; inhibits ion cell proliferation, immunomodulation; stimulates effector proteins; decreases leukocyte, platelet counts

USES:

Chronic hepatitis C infections in adults with compensated liver disease; chronic hepatitis B in adults who are HBe AG positive, HBe AG negative; HCV patients coinfected with HIV; nonresponders or relapsers with chronic hepatitis C, malignant melanoma

Unlabeled uses:
Adenovirus, coronavirus, encephalomyocarditis virus, herpes simplex types 1 and 2, hepatitis D, acute hepatitis C, HIV, HPV, polio virus, rhinovirus, varicella-zoster, variola, vesicular stomatitis

CONTRAINDICATIONS:

Neonates, infants, sepsis; hypersensitivity to interferons, benzyl alcohol,
Escherichia coli
protein

Precautions:
Pregnancy (C), breastfeeding, children <18 yr, geriatric patients, thyroid disorders, myelosuppression, renal/hepatic disease, suicidal/homicidal ideation, preexisting ophthalmologic disorders, pancreatitis, hemodialysis

 

Black Box Warning:

Cardiac disease, depression, autoimmune disease, infection, use with ribavirin

DOSAGE AND ROUTES
Calculator
Pegasys

• Adult:
SUBCUT
180 mcg q wk × 48 wk; if poorly tolerated, reduce dose to 135 mcg q wk; in some cases, reduction to 90 mcg may be needed

Peg-Intron
(chronic hepatitis C with compensated liver disease)

• Adult
>
105 kg:
SUBCUT
1.5 mcg/kg/wk plus ribavirin 600 mg in
AM
and 800 mg in
PM
plus a HCV NS3/4A protease inhibitor;
86-105 kg:
150 mcg/0.5 ml (0.5 ml of 150 mcg vial or Redipen) per wk plus ribavirin 1200 mg/day in 2 divided doses plus a HCV NS3/4A protease inhibitor;
81-85 kg:
120 mcg/0.5 ml (0.5 ml of 120 mcg vial or Redipen) per wk plus ribavirin 1200 mg/day in 2 divided doses plus a HCV NS3/4A protease inhibitor;
76-80 kg:
120 mcg/0.5 ml (0.5 ml of 120 mcg vial or Redipen) per wk plus ribavirin 400 mg in
AM
and 600 mg in
PM
plus a HCV NS3/4A protease inhibitor;
66-75 kg:
96 mcg/0.4 ml (0.4 ml of 120 mcg vial or Redipen) per wk plus ribavirin 400 mg in
AM
and 600 mg in
PM
plus a HCV NS3/4A protease inhibitor;
61-65 kg:
96 mcg/0.4 ml (0.4 ml of 120 mcg vial or Redipen) per wk plus ribavirin 800 mg/day in 2 divided doses plus a HCV NS3/4A protease inhibitor;
51-60 kg:
80 mcg/0.5 ml (0.5 ml of 80 mcg vial or Redipen) per wk plus ribavirin 800 mg/day in 2 divided doses plus a HCV NS3/4A protease inhibitor;
40-50 kg:
64 mcg/0.4 ml (0.4 ml of 80 mcg vial or Redipen) per wk plus ribavirin 800 mg/day in 2 divided doses plus a HCV NS3/4A protease inhibitor;
<40 kg:
50 mcg/0.5 ml (0.5 ml of 50 mcg vial or Redipen) per wk plus ribavirin 800 mg/day in 2 divided doses plus a HCV NS3/4A protease inhibitor

Malignant Melanoma (SYLATRON only)

• Adult:
SUBCUT
6 mcg/kg/wk × 8 wk then 3 mcg/kg/wk × ≤5 yr, premedicate with acetaminophen 500-1000 mg 30 min prior to first dose, prn for subsequent doses

Available forms:
Pegasys: inj 180 mcg/0.5 ml; Pegintron: 50, 80, 120, 150 mcg/0.5 ml; SYLATRON 296, 444, 888 mcg powder for inj

Administer:

• 
In evening to reduce discomfort, to allow patient to sleep through some side effects

• 
Continue pediatric dose in those who turn 18 yr

Interferon alfa-2a

• 
Use prefilled syringes, store in refrigerator

Interferon alfa-2b
SUBCUT/IM route

• 
Reconstitute with 1 ml of provided diluent/10-, 18-, or 50-million unit vials, swirl; sol for inj vials do not need reconstitution

SIDE EFFECTS

CNS:
Headache, insomnia, dizziness
, anxiety, hostility, lability, nervousness, depression, fatigue, poor concentration, pyrexia,
suicidal ideation, homicidal ideation,
relapse of drug addiction, emotional lability, mania, psychosis

CV:
Ischemic CV events

ENDO:
Hypothyroidism, diabetes

GI:
Abdominal pain, nausea, diarrhea, anorexia, vomiting
, dry mouth,
fatal colitis, fatal pancreatitis

HEMA:
Thrombocytopenia,
neutropenia, anemia, lymphopenia

INTEG:
Alopecia, pruritus, rash
, dermatitis

MISC:
Blurred vision, inj site reaction, rigors

MS:
Back pain
, myalgia, arthralgia

RESP:
Cough, dyspnea

PHARMACOKINETICS

Half-life 15-80 hr, large variability in other pharmacokinetics

INTERACTIONS

• 
Use caution when giving with theophylline, myelosuppressive agents

Increase:
hepatic damage-NNRTIs, NRTIs, protein inhibitors

Drug/Lab Test

Increase:
triglycerides, ALT, neutrophils, platelets

Abnormal:
thyroid function test

NURSING CONSIDERATIONS
Assess:

• 
Neuropsychiatric symptoms:
severe depression with suicidal ideation; monitor q3wk then 8 wk then q6mo

• 
B/P, blood glucose, ophthalmic exam, pulmonary function

• 
ALT, HCV viral load; patients who show no reduction in ALT, HCV unlikely to show benefit of treatment after 6 mo

• 
Platelet counts, heme concentration, ANC, serum creatinine concentration, albumin, bilirubin, TSH, T
4
, AFP

 
Myelosuppression:
hold dose if neutrophil count is <500 × 10
6
/L or if platelets are <50 × 10
9
/L

• 
Hypersensitivity:
discontinue immediately if hypersensitivity occurs

• 
Infection:
vital signs, increased WBCs, fever; product may need to be discontinued

 
Colitis/pancreatitis:
may be fatal; diarrhea, fever, nausea, vomiting, severe abdominal pain; if these occur, product should be discontinued

Evaluate:

• 
Therapeutic response: decreased chronic hepatitis C signs, symptoms; undetectable viral load

Teach patient/family:

• 
Provide patient or family member with written, detailed information about product

• 
Use 2 forms of effective contraception throughout treatment and for 6 mo after treatment (men and women) (combination therapy with ribavirin)

• 
To avoid driving, other hazardous activity if dizziness, confusion, fatigue, somnolence occur

• 
To use puncture-resistant container for disposal of needles/syringes if using at home

 
To report suicidal/homicidal ideation, visual changes, bleeding/bruising, pulmonary symptoms

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