Mosby's 2014 Nursing Drug Reference (427 page)

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

zoledronic acid (Rx)

(zoh′leh-drah′nick ass′id)

Reclast, Zometa

Func. class.:
Bone-resorption inhibitor

Chem. class.:
Bisphosphonate

ACTION:

Potent inhibitor of osteoclastic bone resorption; inhibits osteoclastic activity, skeletal calcium release caused by stimulating factors released by tumors; reduction of abnormal bone resorption is responsible for therapeutic effect with hypercalcemia; may directly block dissolution of hydroxyapatite bone crystals

USES:

Moderate to severe hypercalcemia associated with malignancy; multiple myeloma; bone metastases from solid tumors (used with antineoplastics); active Paget’s disease; osteoporosis, glucocorticoid-induced osteoporosis, osteoporosis prophylaxis in postmenopausal women

CONTRAINDICATIONS:

Pregnancy (D), breastfeeding; hypersensitivity to this product or bisphosphonates; hypocalcemia

Precautions:
Children, geriatric patients, renal dysfunction, asthmatic patients, acute bronchospasm, anemia, chemotherapy, coagulopathy, dehydration, dental disease, diabetes mellitus, renal disease, electrolyte imbalance, hypertension, hypovolemia, infection, multiple myeloma, phosphate hypersensitivity

DOSAGE AND ROUTES
Calculator
Hypercalcemia of malignancy

• Adult:
IV INF
4 mg, given as single inf over ≥15 min; may re-treat with 4 mg if serum calcium does not return to normal within 1 wk

Multiple myeloma/metastatic bone lesions

• Adult:
IV INF
4 mg, give over 15 min q3-4wk

Osteoporosis

• Adult:
IV INF
5 mg over ≥15 min q12mo

Active Paget’s disease

• Adult:
IV INF
5 mg over ≥15 min

Osteoporosis prophylaxis (reclast), postmenopausal women

• Adult:
IV INF
5 mg every other year

Osteoporosis prophylaxis (reclast) when taking systemic glucocorticoids

• Adult:
IV
5 mg every yr

Early breast cancer (unlabeled)

• Adult:
IV
4 mg q6mo with goserelin 3.6 mg SUBCUT monthly and tamoxifen 20 mg daily or anastrozole 1 mg daily for 3 yr

Available forms:
(Zometa) sol for inj 4 mg/5 ml; (Reclast) inj 5 mg/100 ml

Administer:

• 
Saline hydration must be performed before administration; urine output should be 2 L/day during treatment; do not overhydrate patient

IV route
Zometa

• 
Administer after reconstituting by adding 5 ml of sterile water for inj to each vial then add to ≥100 ml of sterile 0.9% NaCl, D
5
W; run over ≥15 min

• 
Administer in separate IV line from all other products

Reclast

• 
No further dilution required

• 
Infuse over ≥15 min at constant rate; max 5 mg

SIDE EFFECTS

CNS:
Dizziness, headache, anxiety, confusion, insomnia, agitation

CV:
Hypotension, leg edema,
atrial fibrillation,
chest pain

GI:
Abdominal pain, anorexia, constipation, nausea, diarrhea, vomiting, taste change

GU:
UTI, possible reduced renal function,
renal damage

META:
Anemia, hypokalemia, hypomagnesemia, hypophosphatemia, hypocalcemia, increased serum creatinine

MISC:
Fever, chills, flulike symptoms

MS:
Severe bone pain,
arthralgias, myalgias
,
osteonecrosis of jaw

PHARMACOKINETICS

Rapidly cleared from circulation, taken up mainly by bones, not metabolized, eliminated primarily by kidneys, approximately 50% eliminated in urine within 24 hr, max effect 7 days; terminal half-life 167 hr, protein binding 22%

INTERACTIONS

• 
Hypomagnesemia, hypokalemia: digoxin

Decrease:
effect of zoledronic acid—calcium, vit D

Decrease:
serum calcium, aminoglycosides, loop diuretics

• 
Do not mix with calcium-containing infusion sol such as lactated Ringer’s sol

Increase:
nephrotoxicity—aminoglycosides, NSAIDs, radiopaque contrast agents

Drug/Lab Test

Increase:
creatinine

Decrease:
calcium, phosphorous, magnesium, potassium, Hct/Hgb, RBC, platelets, WBC

NURSING CONSIDERATIONS
Assess:

• 
Renal tests, calcium, phosphate, magnesium, potassium; creatinine, BUN; if creatinine elevated, hold treatment

• 
Hypocalcemia:
paresthesia, twitching, laryngospasm; Chvostek’s/Trousseau’s signs

• 
Dental status; cover with antiinfectives for dental extraction

• 
Atrial fibrillation

Perform/provide:

• 
Sol reconstituted with sterile water may be stored under refrigeration for up to 24 hr

• 
Acetaminophen before and for 72 hr after to decrease pain

Evaluate:

• 
Therapeutic response: decreased calcium levels, increased bone density

Teach patient/family:

• 
To report hypercalcemic relapse: nausea, vomiting, bone pain, thirst

• 
To continue with dietary recommendations, including calcium and vit D; to take a multiple vitamin daily as well as 500 mg of calcium, 400 international units vit D with multiple myeloma

• 
If nausea or vomiting occurs, to eat small, frequent meals, to use lozenges or chewing gum

• 
If bone pain occurs, to notify prescriber to obtain analgesics

• 
To avoid use during pregnancy (D)

• 
To continue good oral hygiene

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

ZOLMitriptan (Rx)

(zole-mih-trip′tan)

Zomig, Zomig-ZMT

Func. class.:
Migraine agent, abortive

Chem. class.:
5-HT
1B
/5HT
1D
receptor agonist (triptan)

ACTION:

Binds selectively to the vascular 5-HT
1B
/5HT
1D
receptor subtype, exerts antimigraine effect; causes vasoconstriction in cranial arteries

USES:

Acute treatment of migraine with/without aura

CONTRAINDICATIONS:

Angina pectoris, history of MI, documented silent ischemia, ischemic heart disease, uncontrolled hypertension, hypersensitivity, basilar or hemiplegic migraine, risk of CV events

Precautions:
Pregnancy (C), breastfeeding, children, postmenopausal women, men >40 yr, geriatric patients, risk factors for CAD, hypercholesterolemia, obesity, diabetes, impaired renal/hepatic function

DOSAGE AND ROUTES
Calculator

• Adult:
PO
start at ≤2.5 mg (tab may be broken), may repeat after 2 hr, max 10 mg/24 hr;
NASAL
1 spray in 1 nostril at onset of migraine, repeat in 2 hr if no relief

Available forms:
Tabs 2.5, 5 mg; orally disintegrating tabs 2.5, 5 mg; nasal spray 5 mg

Administer:

• 
Take with fluids as soon as symptoms of migraine occur

• 
Orally disintegrating tab:
do not crush or chew, allow to dissolve on tongue

SIDE EFFECTS

CNS:
Tingling, hot sensation, burning, feeling of pressure, tightness, numbness, dizziness, sedation

CV:
Palpitations, chest pain

GI:
Abdominal discomfort, nausea, dry mouth, dyspepsia, dysphagia

MISC:
Odd taste (spray)

MS:
Weakness, neck stiffness
, myalgia

RESP:
Chest tightness, pressure

PHARMACOKINETICS

Duration 2-3½ hr; 25% plasma protein binding; half-life 3-3½ hr; metabolized in liver (metabolite); excreted in urine (60-80%), feces (20-40%)

INTERACTIONS

 
Extended vasospastic effects: ergot, ergot derivatives

 
Do not use within 2 wk of MAOIs

 
Weakness, hyperreflexia, incoordination: SSRIs (FLUoxetine, fluvoxaMINE, PARoxetine, sertraline)

Increase:
half-life of ZOLMitriptan—cimetidine, oral contraceptives

Increase:
ZOLMitriptan levels—sibutramine

Drug/Herb

• 
Serotonin syndrome: SAM-e, St. John’s wort

Drug/Lab Test

Increase:
alk phos

NURSING CONSIDERATIONS
Assess:

• 
Tingling, hot sensation, burning, feeling of pressure, numbness, flushing

• 
Neurologic status: LOC, blurring vision, nausea, vomiting, tingling in extremities preceding headache

• 
Ingestion of tyramine foods (pickled products, beer, wine, aged cheese), food additives, preservatives, colorings, artifical sweeteners, chocolate, caffeine, which may precipitate these types of headaches

• 
Serotonin syndrome if also taking SSRI

Evaluate:

• 
Therapeutic response: decrease in frequency, severity of headache

Teach patient/family:

• 
To report any side effects to prescriber

• 
To use contraception while taking product

• 
That product does not prevent or reduce number of migraines

• 
To report chest pain, rash, swelling of face

• 
Not to double doses, if second dose is needed, wait at least 2 hr

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