Mosby's 2014 Nursing Drug Reference (277 page)

BOOK: Mosby's 2014 Nursing Drug Reference
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SIDE EFFECTS

CNS:
Drowsiness, dizziness, confusion, headache, sedation, euphoria, insomnia,
seizures

CV:
Palpitations,
bradycardia,
change in B/P,
shock, cardiac arrest,
chest pain, hypo/hypertension, edema,
tachycardia

EENT:
Tinnitus, blurred vision, miosis, diplopia

GI:
Nausea, vomiting, anorexia, constipation, cramps, biliary tract pressure

GU:
Urinary retention

HEMA:
Thrombocytopenia

INTEG:
Rash, urticaria, bruising, flushing, diaphoresis, pruritus

RESP:
Respiratory depression, respiratory arrest, apnea

PHARMACOKINETICS

PO:
Onset variable, peak variable, duration variable

IM:
Onset 1/2 hr, peak 50-90 min, duration 3-7 hr

SUBCUT:
Onset 15-20 min, peak 50-90 min, duration 3-5 hr

IV:
Peak 20 min

RECT:
Peak 1/2-1 hr, duration 4-5 hr

Intrathecal:
Onset rapid, duration ≤24 hr

Metabolized by liver, crosses placenta; excreted in urine, breast milk; half-life 1½-2 hr

INTERACTIONS

• 
Unpredictable reaction, avoid use: MAOIs

Increase:
effects with other CNS depressants—alcohol, opiates, sedative/hypnotics, antipsychotics, skeletal muscle relaxants

Decrease:
morphine action—rifampin

Drug/Herb

Increase:
anticholinergic effect—corkwood

Increase:
CNS depression—chamomile, hops, kava, St. John’s wort, valerian

Drug/Food

Decrease:
morphine effect—cranberry juice (excessive amounts), oats

Drug/Lab Test

Increase:
amylase

NURSING CONSIDERATIONS
Assess:

• 
Pain:
location, type, character; give dose before pain becomes severe

• 
Bowel status; constipation common, use stimulant laxative if needed

• 
I&O ratio; check for decreasing output; may indicate urinary retention

• 
B/P, pulse, respirations (character, depth, rate)

• 
CNS changes: dizziness, drowsiness, hallucinations, euphoria, LOC, pupil reaction

• 
Abrupt discontinuation:
gradually taper to prevent withdrawal symptoms; decrease by 50% q1-2days; avoid use of narcotic antagonists

• 
Allergic reactions: rash, urticaria

 

Black Box Warning:

Accidental exposure:
if Duramorph or Infumorph gets on skin, remove contaminated clothing, rinse affected area with water

• 
Respiratory dysfunction:
depression, character, rate, rhythm; notify prescriber if respirations are <12/min; accidental overdose has occurred with high-potency oral sols

Perform/provide:

• 
Storage in light-resistant container at room temp

• 
Assistance with ambulation

• 
Safety measures: side rails, night-light, call bell within easy reach

• 
Gradual withdrawal after long-term use

Evaluate:

• 
Therapeutic response; decrease in pain intensity

Teach patient/family:

• 
To change position slowly; orthostatic hypotension may occur

• 
To report any symptoms of CNS changes, allergic reactions

• 
That physical dependency may result from long-term use

• 
To avoid use of alcohol, CNS depressants

• 
That withdrawal symptoms may occur: nausea, vomiting, cramps, fever, faintness, anorexia

TREATMENT OF OVERDOSE:

Naloxone (Narcan) 0.2-0.8 mg IV, (caution with opioid-tolerant individuals) O
2
, IV fluids, vasopressors

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

moxifloxacin (Rx)

Avelox, Avelox IV

Func. class.:
Antiinfective

Chem. class.:
Fluoroquinolone

ACTION:

Interferes with conversion of intermediate DNA fragments into high-molecular-weight DNA in bacteria; DNA gyrase inhibitor

USES:

Acute bacterial sinusitis:
Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis;
acute bacterial exacerbation of chronic bronchitis:
S. pneumoniae, H. influenzae, Haemophilus parainfluenzae, Klebsiella pneumoniae, Staphylococcus aureus, M. catarrhalis;
community-acquired pneumonia:
S. pneumoniae, H. influenzae, Mycoplasma pneumoniae, Chlamydia pneumoniae, M. catarrhalis;
uncomplicated skin/skin-structure infections:
S. aureus, Streptococcus pyogenes;
complicated intraabdominal infections including polymicrobial infections:
E. coli, Bacterioides fragilis, S. anginosus, S. constellatus, Enterococcus faecalis, Proteus mirabilis, Clostridium perfringens, Bacteroides thetaiotaomicron, Peptostreptococcus
sp; complicated skin, skin-structure infections caused by methicillin-susceptible:
S. aureus, E. coli, K. pneumoniae, Enterobacter cloacae

CONTRAINDICATIONS:

Hypersensitivity to quinolones

Precautions:
Pregnancy (C), breastfeeding, children, hepatic/cardiac/renal/GI disease, epilepsy, uncorrected hypokalemia, prolonged QT interval; patients receiving class IA, III antidysrhythmics; seizure disorder

 

Black Box Warning:

Tendon pain, rupture; tendinitis

DOSAGE AND ROUTES
Calculator
Acute bacterial sinusitis

• Adult:
PO/IV
400 mg q24hr × 10 days

Acute bacterial exacerbation of chronic bronchitis

• Adult:
PO/IV
400 mg q24hr × 5 days

Community-acquired pneumonia

• Adult:
PO/IV
400 mg q24hr × 7-14 days

Uncomplicated skin/skin-structure infections

• Adult:
PO/IV
400 mg q24hr × 7 days

Complicated intraabdominal infections

• Adult:
IV
400 mg/day × 5-14 days

Complicated skin, skin-structure infections

• Adult:
PO/IV
400 mg/day × 7-21 days

Available forms:
Tabs 400 mg; inj premix 400 mg/250 ml

Administer:
PO route

• 
4 hr before or 8 hr after antacids, zinc, iron, calcium

• 
Without regard to food

• 
Store at room temperature

IV route

• 
Discontinue primary IV while administering moxifloxacin, give over 60 min

• 
Do not give SUBCUT, IM

• 
Available as premixed sol; may be diluted at ratios from 1:10 to 10:1; do not refrigerate; give by direct inf or through Y-type inf set; do not add other medications to sol or inf through same IV line at same time

• 
Do not refrigerate

• 
Flush line with compatible sol before and after use

• 
Do not admix

Solution compatibilities:
0.9% NaCl, D
5
, D
10
, LR, sterile water for inj

SIDE EFFECTS

CNS:
Headache
, dizziness, fatigue, insomnia, depression,
restlessness
,
seizures,
confusion,
increased intracranial pressure,
peripheral neuropathy,
pseudotumor cerebri

CV:
Prolonged QT interval, dysrhythmias, torsades de pointes,
tachycardia

EENT:
Blurred vision, tinnitus, taste changes

GI:
Nausea, diarrhea
, increased ALT, AST, flatulence, heartburn,
vomiting
, oral candidiasis, dysphagia,
pseudomembranous colitis

INTEG:
Rash
, pruritus, urticaria, photosensitivity, flushing, fever, chills

MS:
Tremor, arthralgia, tendinitis,
tendon rupture,
myalgia

SYST:
Anaphylaxis, Stevens-Johnson syndrome

PHARMACOKINETICS

Excreted in urine as active product, metabolites; parent product excreted in urine (20%), feces (25%); terminal half-life PO 12-16 hr, IV 8-15 hr

INTERACTIONS

Increase:
moxifloxacin serum levels—probenecid

Increase:
warfarin, cycloSPORINE effect

Increase:
seizure risk—NSAIDs

 

Black Box Warning:

Increase:
tendon rupture—corticosteroids

Decrease:
moxifloxacin absorption—magnesium antacids, aluminum hydroxide, zinc, iron, sucralfate, calcium, enteral feeding, didanosine

NURSING CONSIDERATIONS
Assess:

• 
CNS symptoms: headache, dizziness, fatigue, insomnia, depression, seizures

• 
Renal, hepatic studies: BUN, creatinine, AST, ALT

• 
I&O ratio, urine pH <5.5 is ideal

 
Allergic reactions, Stevens-Johnson syndrome, toxic epidermal necrolysis, anaphylaxis:
fever, flushing, rash, urticaria, pruritus, sore throat, fatigue, ulcers, other lesions; keep EPINEPHrine, emergency equipment nearby for anaphylaxis

 

Black Box Warning:

Tendon pain, rupture, tendinitis; if tendon becomes inflamed, product should be discontinued, more common in Achilles tendon

 
Cardiac status:
prolonged QT or use of products that increase QT prolongation

 
Pseudomembranous colitis:
assess for diarrhea, abdominal pain, fever, fatigue, anorexia; possible anemia, elevated WBC, low serum albumin; stop product; usually either vancomycin or IV metroNIDAZOLE given

Perform/provide:

• 
Increased fluids to 3 L/day to avoid crystallization in kidneys

Evaluate:

• 
Therapeutic response: decreased pain, C&S; absence of infection

Teach patient/family:

 

Black Box Warning:

To notify prescriber of tendon pain, inflammation; stop drug

• 
Not to take any products containing magnesium or calcium (such as antacids), iron, or aluminum with this product or 4 hr before or 8 hr after

• 
That photosensitivity may occur; to avoid sunlight or use sunscreen to prevent burns

• 
To use frequent rinsing of mouth, sugarless candy or gum for dry mouth

• 
To take as prescribed; not to double or miss doses

• 
If dizziness occurs, to ambulate, perform activities with assistance

• 
To complete full course of product therapy

• 
To contact prescriber if abnormal heart rhythm or seizures occur

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