Mosby's 2014 Nursing Drug Reference (48 page)

INTEG:
Rash, fever, alopecia

RESP:
Bronchospasm,
dyspnea, wheezing, pulmonary edema

PHARMACOKINETICS

PO:
Peak 2-4 hr; onset 1 hr; duration 24 hr; half-life 6-9 hr; excreted unchanged in urine, feces (50%); protein binding 5%-15%

INTERACTIONS

• 
Mutual inhibition: sympathomimetics (cough, cold preparations)

Increase:
hypotension, bradycardia—reserpine, hydrALAZINE, methyldopa, prazosin, anticholinergics, digoxin, diltiazem, verapamil, cardiac glycosides, antihypertensives

Increase:
hypoglycemia—insulins, oral antidiabetics

Increase:
hypertension—amphetamines, ePHEDrine, pseudoephedrine

Decrease:
effect—insulin, oral antidiabetic agents, theophylline, DOPamine, MAOIs

Drug/Herb

Increase:
atenolol effect—hawthorn

Decrease:
atenolol effect—ephedra (ma huang)

Drug/Lab Test

Increase:
blood glucose, BUN, potassium, triglycerides, uric acid, ANA titer

NURSING CONSIDERATIONS
Assess:

• 
I&O, weight daily; watch for CHF (rales/crackles, jugular vein distention, weight gain, edema)

• 
Hypertension:
B/P, pulse q4hr; note rate, rhythm, quality; apical/radial pulse before administration; notify prescriber of any significant changes (<50 bpm); ECG

• 
Hypotension:
may be caused in hemodialysis

• 
Hypoglycemia:
may be masked in diabetes mellitus

• 
Baselines in renal/hepatic studies before therapy begins

 

Black Box Warning:

Taper gradually do not discontinue abruptly

Perform/provide:

• 
Storage protected from light, moisture; place in cool environment

Evaluate:

• 
Therapeutic response: decreased B/P after 1-2 wk, increased activity tolerance, decreased anginal pain

Teach patient/family:

 

Black Box Warning:

Not to discontinue product abruptly, taper over 2 wk (angina); to take at same time each day as directed

• 
Not to use OTC products unless directed by prescriber

• 
To report bradycardia, dizziness, confusion, depression, fever

• 
To take pulse at home; advise when to notify prescriber

• 
To limit alcohol, smoking, sodium intake

• 
To comply with weight control, dietary adjustments, modified exercise program

• 
To carry emergency ID to identify product, allergies, conditions being treated

• 
To avoid hazardous activities if dizziness is present

• 
To change position slowly

• 
That product may mask symptoms of hypoglycemia in diabetic patients


 
To use contraception while taking this product, pregnancy category (D), avoid breastfeeding

TREATMENT OF OVERDOSE:

Lavage, IV atropine for bradycardia, IV theophylline for bronchospasm, dextrose for hypoglycemia, digoxin, O
2
, diuretic for cardiac failure, hemodialysis

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

atomoxetine (Rx)

(at-o-mox′eh-teen)

Strattera

Func. class.:
Psychotherapeutic—miscellaneous

Chem. class.:
Selective norepinephrine reuptake inhibitor

ACTION:

Selective norepinephrine reuptake inhibitor; may inhibit the presynaptic norepinephrine transporter

USES:

Attention deficit hyperactivity disorder

CONTRAINDICATIONS:

Hypersensitivity, angle-closure glaucoma, arteriosclerosis, cardiac disease, cardiomyopathy, heart failure, jaundice, MAOI therapy, history of pleochromocytoma

Precautions:
Pregnancy (C), breastfeeding, hepatic disease, angioedema, bipolar disorder, dysrhythmias, CAD, hypo/hypertension

 

Black Box Warning:

Children <6 yr, suicidal ideation

DOSAGE AND ROUTES
Calculator

• Child ≤70 kg >6 yrs: PO
0.5 mg/kg/day, increase after 3 days to target daily dose of 1.2 mg/kg in
AM
or evenly divided doses
AM,
late afternoon; max 1.4 mg/kg/day or 100 mg/day, whichever is less

• Adult and child >70 kg: PO
40 mg/day, increase after 3 days to target daily dose of 80 mg in
AM
or evenly divided doses
AM,
late afternoon; max 100 mg/day

Maintenance

• Adolescent ≤15 yr and child ≥6 yr: PO
1.2-1.8 mg/kg/day

Initial dose titration with strong CYP2D6 inhibitors

• Adult and child >6 yr weighing >70 kg: PO
40 mg/day each
AM
or 2 evenly divided doses, titrate to target of 80 mg/day if symptoms do not improve after 4 wk and dose is well tolerated

Hepatic dose

• 
Child-Pugh B: reduce dose by 50%; Child-Pugh C: reduce dose by 75%

Available forms:

Caps 10, 18, 25, 40, 60, 80, 100 mg

Administer:

• 
Whole; do not break, crush, chew

• 
Gum, hard candy, frequent sips of water for dry mouth

• 
Without regard to food

SIDE EFFECTS

CNS:
Insomnia
, dizziness, headache, irritability, crying, mood swings, fatigue, hypoesthesia, lethargy, paresthesia

CV:
Palpitations
, hot flushes, tachycardia, increased B/P

ENDO:
Growth retardation

GI:
Dyspepsia, nausea, anorexia, dry mouth, weight loss, vomiting, diarrhea, constipation,
hepatic injury

GU:
Urinary hesitancy, retention, dysmenorrhea, erectile disturbance, ejaculation failure, impotence, prostatitis, abnormal orgasm, male pelvic pain

INTEG:
Exfoliative dermatitis,
sweating, rash

MISC:
Cough, rhinorrhea, dermatitis, ear infection

PHARMACOKINETICS

Peak 1-2 hr, metabolized by liver, excreted by kidneys, 98% protein binding

INTERACTIONS

Increase:
hypertensive crisis—MAOIs or within 14 days of MAOIs, vasopressors

Increase:
cardiovascular effects of albuterol, pressor agents

Increase:
effects of atomoxetine—CYP2D6 inhibitors (amiodarone, cimetidine [weak], clomipramine, delavirdine, gefitinib, imatinib, propafenone, quiNIDine [potent], ritonavir, citalopram, escitalopram, FLUoxetine, sertraline, PARoxetine, thioridazine, venlafaxine)

NURSING CONSIDERATIONS
Assess:

• 
VS, B/P; check patients with cardiac disease more often for increased B/P


 
Hepatic injury:
May cause liver failure: monitor LFT; assess for jaundice, pruritus, flulike symptoms, upper right quadrant pain

 
Mental status: mood, sensorium, affect, stimulation, insomnia, aggressiveness, suicidal ideation in children/young adults

• 
Appetite, sleep, speech patterns

• 
For increased attention span, decreased hyperactivity with ADHD, growth rate weight, therapy may need to be discontinued

Evaluate:

• 
Therapeutic response: decreased hyperactivity (ADHD)

Teach patient/family:

• 
To avoid OTC preparations unless approved by prescriber, no tapering needed when discontinuing product

• 
To avoid alcohol ingestion

• 
To avoid hazardous activities until stabilized on medication

• 
To get needed rest; patients will feel more tired at end of day; not to take dose late in day, insomnia may occur

 

Black Box Warning:

To report suicidal ideation

• 
To notify prescriber immediately if erection >4 hr

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

atorvastatin (Rx)

(a-tore′va-stat-in)

Lipitor

Func. class.:
Antilipidemic

Chem. class.:
HMG-CoA reductase inhibitor (statin)

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