Mosby's 2014 Nursing Drug Reference (208 page)

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

hyoscyamine (Rx)

(hye-oh-sye′a-meen)

Anaspaz, Colidrops, Colytrol Pediatric, Cystospaz-M, ED-SPAZ, HyoMax, HyoMax SL, Hyosyne, Levisin SL, NuLev, Oscimin, Spasdel, Symax

Func. class.:
Anticholinergic/antispasmodics

Chem. class.:
Belladonna alkaloid

ACTION:

Inhibits muscarinic actions of acetylcholine at postganglionic parasympathetic neuroeffector sites; reduces rigidity, tremors, hyperhidrosis of parkinsonism

USES:

Treatment of peptic ulcer disease in combination with other products; other GI disorders, other spastic disorders, IBS, urinary incontinence

CONTRAINDICATIONS:

Hypersensitivity to anticholinergics, closed-angle glaucoma, GI obstruction, myasthenia gravis, paralytic ileus, GI atony, toxic megacolon, prostatic hypertrophy, urinary tract obstruction

Precautions:
Pregnancy (C), geriatric patients, hyperthyroidism, dysrhythmias, CHF, ulcerative colitis, hypertension, hiatal hernia, renal/hepatic disease, urinary retention, CAD

DOSAGE AND ROUTES
Calculator

• Adult/adolescent/child

12 yr:
PO/SL
0.125-0.25 mg q4hr;
EXT REL
0.375-0.75 mg q12hr

• Adult:
IM/SUBCUT/IV
0.25-0.5 mg in a single dose or 2-4×/day q6hr

• Geriatric:
Max 1.5 mg/day in divided doses or max 4 biphasic tabs

• Child 2-12 yr:
PO
SL 0.0625-0.125 q4hr

Available forms:
Tabs 0.125, 0.15 mg; ext rel caps 0.375 mg; sol 0.125 mg/ml; elix 0.125 mg/5 ml; sol for inj 0.5 mg/ml; SL tab 0.125 mg; tab, biphasic 0.125, 0.375 mg; orally disintegrating tab 0.125 mg

Administer:
PO route

• 
Do not break, crush, or chew ext rel caps

• 
1/2 hr before meals for better absorption

• 
Decreased dose to geriatric patients; metabolism may be slowed

IV route

• 
Use undiluted, inject slowly

SIDE EFFECTS

CNS:
Confusion, stimulation in geriatric patients
, headache, insomnia, dizziness, drowsiness, anxiety, weakness, hallucination

CV:
Palpitations
, tachycardia

EENT:
Blurred vision
, photophobia, mydriasis, cycloplegia, increased ocular tension

GI:
Dry mouth, constipation, paralytic ileus
, heartburn, nausea, vomiting, dysphagia, absence of taste

GU:
Urinary hesitancy, retention
, impotence

INTEG:
Urticaria, rash, pruritus, anhidrosis, fever, allergic reactions

PHARMACOKINETICS

PO:
Duration 4-6 hr, metabolized by liver, excreted in urine, half-life 3.5 hr

INTERACTIONS

Increase:
anticholinergic effect—amantadine, tricyclics, MAOIs, H
1
-antihistamines

Decrease:
hyoscyamine effect—antacids

Decrease:
effect of phenothiazines, levodopa, ketoconazole

NURSING CONSIDERATIONS
Assess:

• 
VS, cardiac status: checking for dysrhythmias, increased rate, palpitations

• 
I&O ratio; check for urinary retention or hesitancy

• 
GI complaints: pain, nausea, vomiting, anorexia

Perform/provide:

• 
Storage in tight container protected from light

• 
Increased fluids, bulk, exercise to decrease constipation

Evaluate:

• 
Therapeutic response: absence of epigastric pain, bleeding, nausea, vomiting

Teach patient/family:

• 
To avoid driving, other hazardous activities until stabilized on medication

• 
To avoid alcohol or other CNS depressants; they will enhance sedating properties of this product

• 
To avoid hot environments because heat stroke may occur; that product suppresses perspiration

• 
To use sunglasses when outside to prevent photophobia; that product may cause blurred vision

• 
To notify prescriber if pregnancy is planned or suspected, pregnancy (C)

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

ibandronate (Rx)

(eye-ban′dro-nate)

Boniva

Func. class.:
Bone-resorption inhibitor, electrolyte modifier

Chem. class.:
Bisphosphonate

ACTION:

Inhibits bone resorption, apparently without inhibiting bone formation and mineralization; absorbs calcium phosphate crystals in bone and may directly block dissolution of hydroxyapatite crystals of bone; more potent than other products

USES:

Osteoporosis and prophylaxis

Unlabeled uses:
Hypercalcemia of malignancy, osteolytic metastases, Paget’s disease, osteoporosis (treatment/prevention) in those taking anastrozole

CONTRAINDICATIONS:

Achalasia, esophageal stricture, hypocalcemia, intraarterial administration, renal failure, hypersensitivity to bisphosphonates

Precautions:
Pregnancy (C), breastfeeding, children, geriatric patients, anemia, chemotherapy, coagulopathy, dental disease, diabetes mellitus, dysphagia, GI/renal disease, GERD, hypertension, infection, multiple myeloma, phosphate hypersensitivity, vit D deficiency

DOSAGE AND ROUTES
Calculator
Postmenopausal osteoporosis

• Adult: PO
2.5 mg/day or 150 mg/mo;
IV BOL
3 mg q3mo

Prophylaxis

• Adult: PO
2.5 mg/day or 150 mg/mo

Paget’s disease (unlabeled)

• Adult: IV
2 mg as a single dose

Osteoporosis in those taking anastrozole (unlabeled)

• Postmenopausal women: PO
150 mg/mo

Osteolytic metastases (unlabeled)

• Adult: IV
6 mg over 1 hr × 3 days, repeat q4wk

Hypercalcemia (unlabeled)

• Adult: IV INF
2-4 mg over 2 hr

Renal dose

• Adult: PO
CCr <30 ml/min, avoid use

Available forms:
Tabs 2.5, 150 mg; sol for inj 1 mg/ml

Administer:
PO route

• 
Give early
AM
with a glass of water; if monthly, give on same day of each month

Direct IV route

• 
Use single-dose prefilled syringe; discard unused portion; give over 15-30 sec; give q3mo, do not use if discolored or contains particulates

SIDE EFFECTS

CNS:
Fever, insomnia, dizziness, headache

CV:
Hypertension,
atrial fibrillation

EENT:
Ocular pain/inflammation, uveitis

GI:
Constipation, nausea, vomiting, diarrhea, dyspepsia

INTEG:
Rash, inj site reaction

META:
Hypomagnesemia, hypophosphatemia, hypocalcemia
, hypercholesterolemia

MS:
Bone pain, myalgia, osteonecrosis of the jaw

PHARMACOKINETICS

Half-life 5-60 hr, 86%-99% protein binding; taken up mainly by bones, primarily in areas of high bone turnover; eliminated primarily by kidneys

INTERACTIONS

Increase:
neurotoxicity—aminoglycosides, cycloSPORINE, tacrolimus, NSAIDs, radiopaque contrast agents, vancomycin

Increase:
hypocalcemia—loop diuretics

Decrease:
ibandronate effect—calcium/vit D/iron/aluminum/magnesium salts; separate by 1 hr

Drug/Food

• 
Do not take with food, calcium

Increase:
cholesterol

Drug/Lab Test

Decrease:
Alk phos, magnesium, calcium, phosphate

NURSING CONSIDERATIONS
Assess:

• 
Osteoporosis:
before and during treatment; DEXA scan for bone mineral density, correct electrolyte imbalances (calcium, magnesium, phosphate) before starting therapy

• 
Atrial fibrillation


 
Dental health:
before dental extraction, give antiinfectives, osteonecrosis of the jaw may occur

• 
Blood studies: electrolytes, creatinine/BUN, vit D: correct deficiencies prior to treatment

• 
For bone pain; use analgesics; may begin within 24 hr or even years after treatment; pain usually subsides after treatment is discontinued

Perform/provide:

• 
Storage at room temp

Evaluate:

• 
Therapeutic response: increased bone mineral density

Teach patient/family:

• 
To report hypercalcemic relapse:
nausea, vomiting, bone pain, thirst, unusual muscle twitching, muscle spasms, severe diarrhea, constipation

• 
To continue with dietary recommendations, including calcium, vit D

• 
To obtain an analgesic from provider for bone pain

• 
That, if nausea, vomiting occur, small, frequent meals may help

• 
To report vision symptoms: blurred vision, edema, inflammation

• 
To report if pregnancy is planned or suspected or if planning to breastfeed, pregnancy (C)

• 
To exercise regularly, stop smoking, decrease alcohol intake

• 
To take PO first thing in
AM
at least 60 min before other medications, food, beverages, to take monthly dose on same day

• 
To sit upright for ≥60 min after PO

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