Mosby's 2014 Nursing Drug Reference (354 page)

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

rimantadine (Rx)

(ri-man′tah-deen)

Flumadine

Func. class.:
Synthetic antiviral

Chem. class.:
Tricyclic amine

Do not confuse:
rimantadine
/amantadine/ranitidine

ACTION:

Prevents uncoating of nucleic acid in viral cell, thereby preventing the penetration of the virus to the host; causes the release of dopamine from neurons

USES:

Prophylaxis or treatment of influenza type A

CONTRAINDICATIONS:

Hypersensitivity to this product, amantadine

Precautions:
Pregnancy (C), breastfeeding, children <1 yr, seizure disorders, renal/hepatic disease

DOSAGE AND ROUTES
Calculator
Influenza type A
Prophylaxis

• Adult and child >10 yr:
PO
100 mg bid

• Child 1-10 yr:
PO
5 mg/kg/day, max 150 mg

Treatment

• Adult:
PO
100 mg bid; start treatment at onset of symptoms, continue for ≥1 wk

• Child ≥10 yr (unlabeled):
PO
200 mg/day either as single dose or in 2 divided doses

• Child 1-9 yr (unlabeled):
PO
6.6 mg/kg/day in 2 divided doses, max 150 mg/day in 2 divided doses

• Geriatric:
PO
100 mg/day

Renal/hepatic dose

• Adult:
PO
≤10 ml/min, 100 mg daily

Available forms:
Tabs 100 mg; syr 50 mg/5 ml

Administer:

• 
Give with full glass of water

• 
Within 48 hr of exposure to influenza; continue for 10 days after contact

• 
At least 4 hr before bedtime to prevent insomnia

• 
After meals for better absorption, to decrease GI symptoms

• 
In divided doses to prevent CNS disturbances: headache, dizziness, fatigue, drowsiness

SIDE EFFECTS

CNS:
Headache, dizziness
, fatigue, depression, hallucinations, tremors,
seizures,
insomnia, poor concentration, asthenia, gait abnormalities,
anxiety
, confusion

CV:
Pallor, palpitations, edema

EENT:
Tinnitus, taste abnormality, eye pain

GI:
Nausea, vomiting
, constipation,
dry mouth, anorexia, abdominal pain
, diarrhea, dyspepsia

INTEG:
Rash

PHARMACOKINETICS

PO:
Peak 6 hr, elimination half-life 13-65 hr, plasma protein binding (40%)

INTERACTIONS

Increase:
rimantadine concentration—cimetidine

Decrease:
peak concentration of rimantadine—acetaminophen, aspirin; intranasal influenza vaccine (separate by ≥48 hr)

NURSING CONSIDERATIONS
Assess:

 
Seizures;
if seizures occur, product should be discontinued

• 
Bowel pattern before, during treatment

• 
CNS effects in geriatric patients, patients with severe renal/hepatic disease

• 
Skin eruptions, photosensitivity after administration of product

• 
Respiratory status: rate, character, wheezing, tightness in chest

• 
Signs of infection

Perform/provide:

• 
Storage in tight, dry container

Evaluate:

• 
Therapeutic response: absence of fever, malaise, cough, dyspnea with infection

Teach patient/family:

• 
About aspects of product therapy: the need to report dyspnea, dizziness, poor concentration, behavioral changes

• 
To avoid hazardous activities if dizziness occurs

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

rimexolone ophthalmic

 

risedronate (Rx)

(rih-sed′roh-nate)

Actonel, Atelvia

Func. class.:
Bone resorption inhibitor

Chem. class.:
Bisphosphonate

Do not confuse:
Actonel
/Actos

ACTION:

Inhibits bone resorption, absorbs calcium phosphate crystal in bone, and may directly block dissolution of hydroxyapatite crystals of bone

USES:

Paget’s disease; prevention, treatment of osteoporosis in postmenopausal women; glucocorticoid-induced osteoporosis; osteoporosis in men

Unlabeled uses:
Osteolytic metastases

CONTRAINDICATIONS:

Hypersensitivity to bisphosphonates, inability to stand or sit upright for ≥30 min, esophageal stricture, achalasia, hypocalcemia

Precautions:
Pregnancy (C), breastfeeding, children, renal disease, active upper GI disorders, dental disease, hyperparathyroidism, infection, vit D deficiency, coagulopathy, chemotherapy, asthma

DOSAGE AND ROUTES
Calculator
Paget’s disease

• Adult:
PO
30 mg/day × 2 mo; patients with Paget’s disease should receive calcium and vit D if dietary intake lacking; if relapse occurs, retreatment advised

Treatment/prevention of postmenopausal osteoporosis

• Adult:
PO
5 mg/day or 35 mg/wk or 75 mg/day × 2 consecutive days 2× monthly or 150 mg/mo

Glucocorticoid osteoporosis

• Adult:
PO
5 mg/day

Osteoporosis in men

• Adult:
PO
35 mg/wk

Osteolytic metastases (unlabeled)

• Adult:
PO
30 mg/day × 6 mo

Renal dose

• Adult:
PO
CCr <30 ml/min, avoid use

Available forms:
Tabs 5, 30, 35, 150 mg; tab, gastro-resistant, weekly 35 mg; tab, weekly 35 mg

Administer:

• 
For 2 months to be effective for Paget’s disease

• 
With a full glass of water; patient should be in upright position for 1/2 hr; swallow whole; do not crush, break, chew

• 
Supplemental calcium and vit D for Paget’s disease if instructed by prescriber

• 
Give daily ≥30 min before meals or give weekly

SIDE EFFECTS

CNS:
Dizziness, headache, depression

CV:
Chest pain
, hypertension,
atrial fibrillation

GI:
Abdominal pain, diarrhea, nausea
, constipation, esophagitis

MISC:
Rash, UTI, pharyngitis, hypocalcemia, hypophosphatemia, increase PTH

MS:
Osteonecrosis of the jaw,
severe muscle/joint/bone pain, fractures

SYST:
Angioedema

PHARMACOKINETICS

Rapidly cleared from circulation, taken up mainly by bones (50%), eliminated primarily through kidneys, absorption decreased by food, terminal half-life 220 hr

INTERACTIONS

Increase:
GI irritation—NSAIDs, salicylates

Decrease:
absorption of risedronate—aluminum, calcium, iron, magnesium salts, antacids

Drug/Food

Decrease:
bioavailability—take 1/2 hr before food or drinks other than water

Drug/Lab Test

Decrease:
calcium

NURSING CONSIDERATIONS
Assess:

• 
Paget’s disease:
headache, bone pain, increased head circumference

• 
Osteoporosis:
in men or postmenopausal women; bone density study before and periodically during treatment

• 
Phosphate, alk phos, calcium; creatinine, BUN (renal disease)

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

 
Serious skin reactions:
angioedema

• 
Dental health:
assess dental health, provide antiinfectives for dental extraction; cover with antiinfectives before dental extraction

 
For atrial fibrillation

Perform/provide:

• 
Storage in cool environment, out of direct sunlight

Evaluate:

• 
Therapeutic response: increased bone mass, absence of fractures

Teach patient/family:

• 
To sit upright for 1/2 hr after dose to prevent irritation

• 
To comply with diet, vitamin/mineral supplements

• 
To notify prescriber if pregnancy is suspected or if breastfeeding

• 
To maintain good oral hygiene

• 
To notify all health care providers of use

• 
That musculoskeletal pain may occur within a few days/mo after starting but usually resolves; use acetaminophen

• 
To exercise regularly; to avoid alcohol, tobacco

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