Mosby's 2014 Nursing Drug Reference (138 page)

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

dolasetron (Rx)

(do-la′se-tron)

Anzemet

Func. class.:
Antiemetic

Chem. class.:
5-HT3 receptor antagonist

ACTION:

Prevents nausea, vomiting by blocking serotonin peripherally, centrally, and in the small intestine

USES:

Prevention of nausea, vomiting associated with cancer chemotherapy, radiotherapy; prevention of postoperative nausea, vomiting

Unlabeled uses:
Radiotherapy-induced nausea/vomiting

CONTRAINDICATIONS:

Hypersensitivity

Precautions:
Pregnancy (B), breastfeeding, children, geriatric patients, hypokalemia, electrolyte imbalances; granisetron/ondansetron/palonosetron hypersensitivity, QT prolongation

DOSAGE AND ROUTES
Calculator
Prevention of nausea and vomiting during cancer chemotherapy


Adult: PO
100 mg 1 hr before chemotherapy

• Child 2-16 yr: PO
1.8 mg/kg before chemotherapy; max 100 mg

Prevention of postoperative nausea and vomiting


Adult: IV
12.5 mg as single dose 15 min before cessation of anesthesia;
PO
100 mg 2 hr before surgery (prevention only)

• Child 2-16 yr: IV
0.35 mg/kg as single dose 15 min before cessation of anesthesia;
PO
1.2 mg/kg 2 hr before surgery (prevention only)

Available forms:
Tabs 50, 100 mg; inj 20 mg/ml (12.5 mg/0.625 ml)

Administer:
PO route

• 
Do not mix product for oral administration in apple or apple-grape juice until immediately before administration; diluted product can be kept for 2 hr at room temp

Intermittent IV INF route

• 
By inj 100 mg/30 sec or more or diluted in 50 ml compatible sol; give over 15 min

• 
Do not admix

SIDE EFFECTS

CNS:
Headache
, dizziness, fatigue, drowsiness

CV:
Dysrhythmias,
ECG changes, hypo/hypertension, tachycardia, bradycardia;
ventricular tachycardia/fibrillation, QT prolongation, torsades de pointes, cardiac arrest (IV)

GI:
Diarrhea
, constipation, increased AST/ALT, abdominal pain, anorexia

GU:
Urinary retention, oliguria

MISC:
Rash,
bronchospasm

PHARMACOKINETICS

Well absorbed, metabolized to active metabolite, half-life of active metabolite 8 hr, max concentrations after 1 hr

INTERACTIONS


 
QT Prolongation:
QRS, PR prolongation; do not use in those with congenital long QT syndrome, hypokalemia, hypomagnesemia, complete heart block (unless a pacemaker is in place), correct electrolytes before use, monitor ECG in elderly patients, renal cardiac disease

Increase:
dysrhythmias—antidysrhythmics

Increase:
dolasetron levels—cimetidine

Increase:
QT prolongation—thiazide/loop diuretics, antidysrhythmics—class IA, III, arsenic trioxide, chloroquine, clarithromycin, droperidol, erythromycin, halofantrine, haloperidol, levomethadyl, methadone, pentamidine, some phenothiazines, ziprasidone; occurs at higher dose of dolasetron

Decrease:
dolasetron levels—rifampin

NURSING CONSIDERATIONS
Assess:

• 
For absence of nausea, vomiting during chemotherapy


 
Hypersensitivity reaction:
rash, bronchospasm


 
Cardiac conduction conditions, electrolyte imbalances, dysrhythmias, heart rate

Perform/provide:

• 
Storage at room temp 48 hr after dilution

Evaluate:

• 
Therapeutic response: absence of nausea, vomiting during cancer chemotherapy

Teach patient/family:

• 
To report diarrhea, constipation, nausea, vomiting, rash, or changes in respirations

• 
May cause headache; use analgesic

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

donepezil (Rx)

(don-ep-ee′zill)

Aricept, Aricept ODT

Func. class.:
Anti-Alzheimer’s agent

Chem. class.:
Reversible cholinesterase inhibitor

ACTION:

Elevates acetylcholine concentrations (cerebral cortex) by slowing degradation of acetylcholine released in cholinergic neurons; does not alter underlying dementia

USES:

Mild to severe dementia with Alzheimer’s disease

Unlabeled uses:
Subcortical, vascular dementia; dementia with Lewy bodies

CONTRAINDICATIONS:

Hypersensitivity to this product or piperidine derivatives

Precautions:
Pregnancy (C), breastfeeding, children, sick sinus syndrome, history of ulcers, GI bleeding, hepatic disease, bladder obstruction, asthma, seizures, COPD, abrupt discontinuation, AV block, GI obstruction, Parkinson’s disease, surgery

DOSAGE AND ROUTES
Calculator


Adult: PO
5 mg/day at bedtime; may increase to 10 mg/day after 4-6 wk, may increase to 23 mg/day after 3 mo of 10 mg/day

Available forms:
Tabs 5, 10, 23 mg; orally disintegrating tabs (Aricept ODT) 5, 10 mg

Administer:

• 
Daily in the evening before bedtime; swallow whole; do not cut, break, chew, or crush tab

• 
Dosage adjusted to response no more than q4-6wk; oral dosage forms are interchangeable

• 
Orally disintegrating tabs:
allow to dissolve on tongue before swallowing; may be given with/without water

SIDE EFFECTS

CNS:
Dizziness,
insomnia
, somnolence,
headache
, fatigue, abnormal dreams, syncope,
seizures,
drowsiness, agitation, depression, confusion, fever, hallucinations

CV:
Atrial fibrillation,
hypo/hypertension,
sinus bradycardia, AV block

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

GU:
Urinary frequency, UTI, incontinence

INTEG:
Rash, flushing, diaphoresis, bruising

META:
Hyperlipidemia

MS:
Cramps, arthritis, arthralgia

RESP:
Rhinitis, URI, cough, pharyngitis, dyspnea

PHARMACOKINETICS

Well absorbed PO; metabolized by CYP2D6, CYP3A4; elimination half-life 10 hr single dose, 70 hr multiple doses; protein binding 96%

INTERACTIONS

Increase:
donepezil effects—CYP2D6, CYP3A4 inhibitors

Increase:
synergistic effect—succinylcholine, cholinesterase inhibitors, cholinergic agonists

Increase:
gastric acid secretions—NSAIDs

Decrease:
donepezil effects—CYP2D6, CYP3A4 inducers

Decrease:
action of anticholinergics

Decrease:
donepezil effect—carBAMazepine, dexamethasone, phenytoin, PHENobarbital, rifampin

Drug/Herb

Decrease:
donepezil—St. John’s wort

NURSING CONSIDERATIONS
Assess:

• 
B/P: hypo/hypertension, heart rate

• 
Mental status: affect, mood, behavioral changes, depression, complete suicide assessment; neurologic status

• 
GI status: nausea, vomiting, anorexia, diarrhea; monitor weight

• 
GU status: urinary frequency, incontinence, I&O

Perform/provide:

• 
Assistance with ambulation during beginning therapy; dizziness, ataxia may occur

Evaluate:

• 
Therapeutic response: decrease in confusion, improved mood

Teach patient/family:

• 
To report side effects: twitching, nausea, vomiting, sweating, dizziness; indicates cholinergic crisis or overdose

• 
To use product exactly as prescribed

• 
To notify prescriber of nausea, vomiting, diarrhea (dose increase or beginning treatment), or rash


 
Not to increase or abruptly decrease dose; serious consequences may result

• 
That product is not a cure, relieves symptoms

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

BOOK: Mosby's 2014 Nursing Drug Reference
10.36Mb size Format: txt, pdf, ePub
ads

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