Mosby's 2014 Nursing Drug Reference (221 page)

BOOK: Mosby's 2014 Nursing Drug Reference
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PHARMACOKINETICS

β-1a:
Onset ≤12 hr, peak 48 hr, duration 4 days, half-life 8.6 hr

β-1b:
Onset rapid, peak 2-8 hr, duration unknown, half-life 8 min-4.3 hr

INTERACTIONS

Increase:
hepatic damage—antiretrovirals (NNRTIs, NRTIs, protease inhibitors)

Increase:
myelosuppression—antineoplastics

Decrease:
clearance of zidovudine

Drug/Herb

• 
Change in immunomodulation: astragalus, echinacea, melatonin

Drug/Lab Test

Interference:
vaccines, toxoids; avoid concurrent use

Increase:
LFTs

NURSING CONSIDERATIONS
Assess:

• 
Blood, hepatic studies: CBC, differential, platelet counts, BUN, creatinine ALT, urinalysis; if absolute neutrophil count <750/mm
3
or if AST/ALT is 10× normal, discontinue product

• 
CNS symptoms: headache, fatigue, depression

• 
GI status: diarrhea or constipation, vomiting, abdominal pain

• 
Cardiac status: increased B/P, tachycardia

• 
Mental status: depression, depersonalization,
suicidal thoughts,
insomnia

• 
Multiple sclerosis symptoms

Perform/provide:

• 
Storage in refrigerator; do not freeze

Evaluate:

• 
Therapeutic response: decreased symptoms of multiple sclerosis

Teach patient/family:

• 
With written, detailed information about product

• 
That blurred vision, sweating may occur

• 
That female patients may experience irregular menses, dysmenorrhea or metrorrhagia, breast pain

• 
To use sunscreen to prevent photosensitivity

• 
To notify prescriber if pregnancy is suspected

• 
About inj technique, care of equipment


 
To notify prescriber of increased temp, chills, muscle soreness, fatigue, depression, symptoms of hepatotoxicity

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

interferon gamma-1b (Rx)

(in-ter-feer′on)

Actimmune

Func. class.:
Biologic response modifier

Chem. class.:
Lymphokine, interleukin type

ACTION:

Species-specific protein synthesized in response to viruses, effects; can mediate killing of
Staphylococcus aureus, Toxoplasma gondii, Leishmania donovani, Listeria monocytogenes, Mycobacterium avium intracellulare;
enhances oxidative metabolism of macrophages, enhances antibody-dependent cellular cytotoxicity

USES:

Serious infections associated with chronic granulomatous disease, osteopetrosis

Unlabeled uses:
Mycobacterium avium
complex (MAC), pulmonary fibrosis

CONTRAINDICATIONS:

Hypersensitivity to interferon-γ,
Escherichia coli
–derived products

Precautions:
Pregnancy (C), breastfeeding, children <1 yr, cardiac disease, seizure disorders, CNS disorders, myelosuppression

DOSAGE AND ROUTES
Calculator

• Adult: SUBCUT
50 mcg/m
2
(1.5 million units/m
2
) for patients with surface area >0.5 m
2
; 1.5 mcg/kg/dose for patients with surface area <0.5 m
2
; give Monday, Wednesday, Friday for 3×/wk dosing

Available forms:
Inj 100 mcg (2 million units)/single-dose vial

Administer:

• 
At bedtime to minimize adverse reactions; give acetaminophen for fever, headache

• 
50% of dose if severe reactions occur or discontinue treatment until reactions subside

• 
In right and left deltoid and anterior thigh

• 
Warm to room temp before use; do not leave at room temp >12 hr (unopened vial)

SIDE EFFECTS

CNS:
Headache, fatigue
, depression, fever, chills

GI:
Nausea, anorexia
, abdominal pain, weight loss, diarrhea, vomiting, colitis

HEMA:
Leukopenia, thrombocytopenia, neutropenia

INTEG:
Rash, pain at inj site,
Stevens-Johnson syndrome

MS:
Myalgia, arthralgia

PHARMACOKINETICS

SUBCUT:
Dose absorbed 89%, elimination half-life 5.9 hr, peak 7 hr

INTERACTIONS

Increase:
myelosuppression—other myelosuppressive agents

Increase:
level of theophylline, aminophylline

Increase:
liver toxicity—protease inhibitors, nucleoside reverse transcriptase inhibitors (NRTIs), nonnucleoside reverse transcriptase inhibitors (NNRTIs)

NURSING CONSIDERATIONS
Assess:

• 
Blood, renal, hepatic studies: CBC, differential, platelet counts, BUN, creatinine, ALT, urinalysis

• 
CNS symptoms: headache, fatigue, depression

Perform/provide:

• 
Storage in refrigerator upon receipt; do not freeze; do not shake

Evaluate:

• 
Therapeutic response: decreased serious infections; improvement in existing infections and inflammatory conditions

Teach patient/family:

• 
About the method of administration if family members will be giving medication

• 
With written, detailed information about product

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

ipilimumab

(ip-i-lim′ue-mab)

Yervoy

Func. class.:
Antineoplastic; biologic response modifier

ACTION:

A recombinant, human monoclonal antibody that binds to the cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4); action is indirect, possibly through T-cell–mediated anti-tumor immune responses

USES:

Treatment of unresectable or metastatic malignant melanoma

CONTRAINDICATIONS

Hyper-sensitivity

Precautions:
Pregnancy, breastfeeding, Crohn’s disease, hepatitis, immunosuppression, inflammatory bowel disease, iritis, ocular disease, organ transplant, pancreatitis, renal disease, rheumatoid arthritis, sarcoidosis, systemic lupus erythematosus, thyroid disease, ulcerative colitis, uveitis

 

Black Box Warning:

Adrenal insufficiency, diarrhea, Guillain-Barré syndrome, hepatic disease, myasthenia gravis, hypo/hyperthyroidism, hypopituitarism, peripheral neuropathy, serious rash

DOSAGE AND ROUTES
Calculator

• Adult/geriatric: IV
3 mg/kg over 90 min q3wk × 4 doses; permanently discontinue if the full treatment course is not completed within 16 wk from 1st dose or for severe or life-threatening adverse reactions; withhold a dose for any moderate endocrine or immune-mediated adverse reactions; if the moderate adverse reaction completely or partially resolves (Grade 0-1) and if the patient is receiving <7.5 mg predniSONE or equivalent/day, resume at a dose of 3 mg/kg IV q3wk until all 4 planned doses or 16 wk from 1st dose, whichever occurs earlier; if moderate adverse reactions are persistent or if the corticosteroid dose cannot be reduced to 7.5 mg predniSONE or equivalent/day, permanently discontinue

Available forms:
Sol for inj 50 mg/10 ml, 200 mg/40 ml

Administer:
Intermittent IV INF route

• 
Visually inspect parenteral products for particulate matter and discoloration before using whenever sol and container permit; sol may have a pale yellow color and have translucent to white, amorphous particles; discard the vial if sol is cloudy, if there is pronounced discoloration, or if particulate matter is present

• 
Allow vials to stand at room temperature for 5 min before inf preparation; withdraw the required volume and transfer into an IV bag; discard partially used vials or empty vials; dilute with 0.9% sodium chloride injection or 5% dextrose injection to a final conc (1-2 mg/ml); mix diluted sol by gentle inversion; do not admix

• 
Give inf over 90 min through an IV line with a low-protein binding in-line filter, do not give with other products; after each inf, flush the line with 0.9% sodium chloride injection or 0.5% dextrose injection

SIDE EFFECTS

CNS:
Severe and fatal immune-mediated neuropathies, fatigue, headache, fever

EENT:
Uveitis, iritis, episcleritis

ENDO:
Severe and fatal immune-mediated endocrinopathies

GI:
Severe and fatal immune-mediated enterocolitis, hepatitis, pancreatitis, abdominal pain, nausea, diarrhea, appetite decreased, vomiting, constipation, colitis

INTEG:
Severe and fatal immune-mediated dermatitis pruritus, rash, urticaria

MISC:
Cough, dyspnea, anemia, eosinophilia, nephritis

SYST:
Antibody formation, Stevens-Johnson syndrome, toxic epidermal necrolysis

PHARMACOKINETICS:

Steady state by 3rd dose; terminal half-life 14.7 days

NURSING CONSIDERATIONS


 
Serious skin disorders: Stevens-Johnson syndrome, toxic epidermal necrolysis:
permanently discontinue in these or rash complicated by full thickness dermal ulceration or necrotic, bullous, or hemorrhagic manifestations like bullous rash; give systemic corticosteroids at a dose of 1-2 mg/kg/day of predniSONE or equivalent; when dermatitis is controlled, taper corticosteroids over a period of at least 1 mo, withhold in patients with moderate to severe reactions; for mild to moderate dermatitis (localized rash and pruritus), give topical or systemic corticosteroids


 
Hepatotoxicity:
monitor liver functions tests baseline and before each dose to rule out infectious or malignant causes, increase the frequency of liver function test monitoring until resolution, permanently discontinue in patients with Grade 3-5 toxicity, give systemic corticosteroids at a dose of 1-2 mg/kg/day of predniSONE or equivalent

• 
Neuropathy:
monitor for motor or sensory neuropathy (unilateral or bilateral weakness, sensory alterations, or paresthesias) before each dose; permanently discontinue if severe neuropathy (interfering with daily activities), such as Guillain-Barré–like syndromes, occur

• 
Endocrinopathy:
monitor thyroid function tests at baseline and before each dose; monitor hypophysitis, adrenal insufficiency, adrenal crisis, hypo/hyperthyroidism (fatigue, headache, mental status changes, abdominal pain, unusual bowel habits, hypotension, or nonspecific symptoms that may resemble other causes)

Perform/provide:

• 
Storage once diluted for no more than 24 hr refrigerated or at room temperature

Evaluate:
Decreasing spread of malignant melanoma

Teach patient/family:


 
To immediately report allergic reactions, skin rash, severe abdominal pain, yellowing of skin or eyes, tingling of extremities, change in bowel habits

• 
About the reason for treatment and expected results

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