Mosby's 2014 Nursing Drug Reference (210 page)

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

HIGH ALERT
ibutilide (Rx)

(eye-byoo′tih-lide)

Corvert

Func. class.:
Antidysrhythmic (class III)

Chem. class.:
Methane sulfonamide

ACTION:

Prolongs duration of action potential and effective refractory period

USES:

For rapid conversion of atrial fibrillation/flutter, including within 1 wk of coronary artery bypass or valve surgery

CONTRAINDICATIONS:

Hypersensitivity

Precautions:
Pregnancy (C), breastfeeding, children <18 yr, geriatric patients, sinus node dysfunction, 2nd- or 3rd-degree AV block, electrolyte imbalances, bradycardia, renal/hepatic disease, CHF

 

Black Box Warning:

QT prolongation, torsades de pointes, ventricular arrhythmias, ventricular tachycardia, cardiac dysrhythmias

DOSAGE AND ROUTES
Calculator
Atrial fibrillation/flutter

• Adult ≥60 kg: IV INF
1 vial (1 mg) given over 10 min, may repeat same dose after 10 min

• Adult <60 kg: IV INF
0.01 mg/kg given over 10 min, may repeat same dose after 10 min

Available forms:
Inj 0.1 mg/ml

Administer:


 
Ice compress after stopping inf for extravasation, tubing should be removed and attempt to aspirate product, elevate affected areas

IV route

• 
Undiluted or diluted in 50 ml 0.9% NaCl, or D
5
W (0.017 mg/ml); give over 10 min

• 
Solution is stable for 48 hr refrigerated or 24 hr at room temp

• 
Do not admix with other sol, products

• 
Reduce dosage slowly with ECG monitoring

• 
Stop infusion as soon as arrhythmia is controlled

• 
Do not use if discolored or particulate is present

SIDE EFFECTS

CNS:
Headache

CV:
Hypotension, bradycardia
,
sinus arrest, CHF, dysrhythmias, torsades de pointes,
hypertension, extrasystoles, ventricular tachycardia, bundle branch block, AV block, palpitations, supraventricular extrasystoles, syncope,
prolonged QT interval

GI:
Nausea

PHARMACOKINETICS

Elimination half-life 6 hr, metabolized by liver, excreted by kidneys

INTERACTIONS

Increase:
prodysrhythmia—phenothiazines, tricyclics, tetracyclics, antidepressants, H
1
-receptor antagonists, antihistamines

Increase:
masking of cardiotoxicity—digoxin


 
Do not use within 5 hr of ibutilide: class Ia antidysrhythmics (disopyramide, quiNIDine, procainamide), class III agents (amiodarone, sotalol)

NURSING CONSIDERATIONS
Assess:

 

Black Box Warning:

ECG continuously for ≥4 hr to determine product effectiveness; measure PR, QRS, QT intervals, check for PVCs, other dysrhythmias; discontinue if atrial fibrillation/flutter ceases; continue until QT interval corrected for heart rate (QTc) returned to baseline; if used ≥2 days, anticoagulation must be adequate

• 
I&O ratio; electrolytes: K, Na, Cl

• 
Hepatic studies: AST, ALT, bilirubin, alk phos

• 
Dehydration or hypovolemia

• 
Rebound hypertension after 1-2 hr

• 
Cardiac rate, respiration: rate, rhythm, character, chest pain

Evaluate:

• 
Therapeutic response: decrease in atrial fibrillation/flutter

Teach patient/family:

• 
To report side effects immediately

• 
About reason for medication

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

HIGH ALERT
IDArubicin (Rx)

(eye-dah-roob′ih-sin)

Idamycin PFS

Func. class.:
Antineoplastic, antibiotic

Chem. class.:
Anthracycline glycoside

Do not confuse:
IDArubicin
/DOXOrubicin/DAUNOrubicin/epirubicin
Idamycin
/Adriamycin

ACTION:

Non–cell-cycle specific; topoisomerase II inhibitor; vesicant; intercalcalating between DNA base pairs, causing shape change, low free radicals

USES:

Used in combination with other antineoplastics for acute myelocytic leukemia in adults

Unlabeled uses:
Breast cancer, liquid tumors, non-Hodgkin’s lymphoma, ALL, CLL, AML

CONTRAINDICATIONS:

Pregnancy (D), breastfeeding, hypersensitivity

 

Black Box Warning:

Myelosuppression, bilirubin >5 mg/dl

Precautions:
Children, gout, bone marrow depression, preexisting CV disease

 

Black Box Warning:

Renal/hepatic disease, heart failure

DOSAGE AND ROUTES
Calculator

• Adult: IV
8-12 mg/m
2
/day × 3 days in combination with cytarabine (induction)

• Adolescent/child (unlabeled): IV
10-12 mg/m
2
/day × 3 days

Renal/hepatic dose

• Adult: IV
CCr >2.5 mg/dl, reduce dose; bilirubin 2.5-5 mg/dl, reduce dose by 50%; bilirubin >5 mg/dl, do not use

Available forms:
Inj 1 mg/ml

Administer:

• 
Ice compress after stopping inf for extravasation

Intermittent IV INF route

• 
Do not give IM/SUBCUT

• 
Use cytotoxic handling procedures after preparing in biologic cabinet wearing gown, gloves, mask

• 
Antiemetic 30-60 min before product and 6-10 hr after treatment to prevent vomiting

• 
After reconstituting 5-mg vial with 5 ml 0.9% NaCl (1 mg/1 ml); give over 10-15 min through
Y
-tube or 3-way stopcock of inf of D
5
or NS; discard unused portion; use caution when needle inserted into vial (negative pressure)

Y-site compatibilities:
Amifostine, amikacin, aztreonam, cimetidine, cladribine, cyclophosphamide, cytarabine, diphenhydrAMINE, droperidol, erythromycin, filgrastim, granisetron, imipenem/CISplatin, magnesium sulfate, mannitol, melphalan, metoclopramide, potassium chloride, ranitidine, sargramostim, thiotepa, vinorelbine

SIDE EFFECTS

CNS:
Fever, chills,
headache
,
seizures

CV:
Dysrhythmias, CHF, pericarditis, myocarditis,
peripheral edema, angina,
MI, myocardial toxicity

GI:
Nausea, vomiting, abdominal pain, mucositis, diarrhea
,
hepatotoxicity

GU:
Nephrotoxicity,
red urine

HEMA:
Thrombocytopenia, leukopenia, anemia

INTEG:
Rash,
extravasation,
dermatitis,
reversible alopecia
, urticaria; thrombophlebitis and tissue necrosis at inj site; radiation recall

SYST:
Infection,
tumor lysis syndrome

PHARMACOKINETICS

Half-life 22 hr; metabolized by liver; crosses placenta; excreted in bile, urine (primarily as metabolites); 97% protein binding

INTERACTIONS

Increase:
bleeding risk—anticoagulants, salicylates, NSAIDs, thrombolytics; avoid concurrent use

Decrease:
IDArubicin effect—corticosteroids

Increase:
CHF, ventricular dysfunction—trastuzumab

Increase:
ECG changes (QT prolongation, changes in QRS voltage)—class IA/III antidysrhythmias, some phenothiazines, and other products that increase QT prolongation

Increase:
cardiotoxicity—cyclophosphamide

Increase:
toxicity—other antineoplastics or radiation

Decrease:
antibody response—live virus vaccines

Drug/Lab Test

Decrease:
calcium, platelets, neutrofils

Increase:
uric acid, phosphate, potassium

NURSING CONSIDERATIONS
Assess:

 

Black Box Warning:

CBC, differential, platelet count weekly; notify prescriber of results, severe myelosuppression can occur

• 
Renal studies: BUN, serum uric acid, urine CCr, electrolytes before, during therapy

 
Tumor lysis syndrome: hyperkalemia, hyperphosphatemia, hyperuricemia, hypocalcemia

• 
I&O ratio; report fall in urine output to <30 ml/hr

• 
Monitor temp; fever may indicate beginning infection

 

Black Box Warning:

Hepatic studies before, during therapy: bilirubin, AST, ALT, alk phos prn or monthly; check for jaundice of skin and sclera, dark urine, clay-colored stools, itchy skin, abdominal pain, fever, diarrhea

 

Black Box Warning:

Cardiac toxicity: CHF, dysrythmias, cardiomyopathy; cardiac studies before and periodically during treatment: ECG, chest x-ray, MUGA; ECG: watch for ST-T wave changes, low QRS and T, possible dysrhythmias (sinus tachycardia, heart block, PVCs)

• 
Bleeding:
hematuria, guaiac stools, bruising or petechiae, mucosa or orifices

• 
Effects of alopecia on body image; discuss feelings about body changes

• 
Inflammation of mucosa, breaks in skin

• 
Buccal cavity for dryness, sores, ulceration, white patches, oral pain, bleeding, dysphagia

 

Black Box Warning:

Local irritation, pain, burning at inj site; extravasation (vesicant)

• 
GI symptoms: frequency of stools, cramping

Perform/provide:

• 
Strict handwashing technique, gloves, protective clothing

• 
Increase fluid intake to 2-3 L/day to prevent urate and calculi formation

• 
Rinsing of mouth tid-qid with water, club soda; brushing of teeth tid-qid with soft brush or cotton-tipped applicators for stomatitis; use unwaxed dental floss

• 
Storage at room temp for 3 days after reconstituting or 7 days refrigerated

Evaluate:

• 
Therapeutic response: decreased liquid tumor, spread of malignancy

Teach patient/family:


 
To report signs of CHF, cardiac toxicity, beginning infection

• 
That hair may be lost during treatment; that wig or hairpiece may make patient feel better; that new hair may be different in color, texture

• 
To avoid foods with citric acid, hot or rough texture

• 
To avoid crowds, persons with upper respiratory illness

• 
To report any bleeding, white spots, ulcerations in mouth; to examine mouth daily

• 
That urine may be red-orange for 48 hr


 
To report if pregnancy is planned or suspected, pregnancy (D)


 
To use contraception during treatment, for ≥4 mo after treatment

• 
That all body fluids will change color

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