Mosby's 2014 Nursing Drug Reference (316 page)

BOOK: Mosby's 2014 Nursing Drug Reference
4.71Mb size Format: txt, pdf, ePub
TREATMENT OF ANAPHYLAXIS:

Withdraw product; maintain airway; administer EPINEPHrine, aminophylline, O
2
, IV corticosteroids

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

pentamidine (Rx)

(pen-tam′i-deen)

Nebupent, Pentam 300

Func. class.:
Antiprotozoal

Chem. class.:
Aromatic diamide derivative

ACTION:

Interferes with DNA/RNA synthesis in protozoa

USES:

Treatment/prevention of
Pneumocystis jiroveci
infections

Unlabeled uses:
Leishmania/Trypanosoma
infections

CONTRAINDICATIONS:

Hypersensitivity

Precautions:
Pregnancy (C), breastfeeding, children, blood dyscrasias, cardiac/renal/hepatic disease, diabetes mellitus, hypocalcemia, hypo/hypertension, anemia

DOSAGE AND ROUTES
Calculator

• Adult and child

4 mo:
IV/IM
4 mg/kg/day × 2-3 wk;
NEB
300 mg via specific nebulizer given q4wk for prevention

Available forms:
Inj, aerosol 300 mg/vial; sol for aerosol 60 mg/vial

Administer:
Inhalation route

• 
Through nebulizer, using Raspirgard II jet nebulizer; mix contents in 6 ml of sterile water; do not use low pressure (<20 psi); flow rate should be 5-7 L/min (40-50 psi) air or O
2
source over 30-45 min until chamber is empty

IM route

• 
300 mg diluted in 3 ml sterile water; give deep IM by
Z
-track; if painful by this route, rotate inj site

Intermittent IV INF route

• 
Reconstitute 300 mg/3-5 ml of sterile water for inj, D
5
W, withdraw dose and further dilute in 50-250 ml D
5
W, give over 1-2 hr with patient lying down; check B/P often

Y-site compatibilities:
Alfentanil, atracurium, atropine, benztropine, buprenorphine, calcium gluconate, CARBOplatin, caspofungin, chlorproMAZINE, cimetidine, CISplatin, cyclophosphamide, cycloSPORINE, cytarabine, DACTINomycin, diltiazem, gatifloxacin, zidovudine

SIDE EFFECTS

CNS:
Disorientation, hallucinations,
dizziness
, confusion, drowsiness

CV:
Hypotension, ventricular tachycardia,
QT prolongation, dysrhythmias

GI:
Nausea, vomiting, anorexia;
increased AST, ALT;
acute pancreatitis,
metallic taste

GU:
Acute renal failure, increased serum creatinine, renal toxicity,
decreased urination

HEMA:
Anemia,
leukopenia, thrombocytopenia

INTEG:
Sterile abscess, pain at inj site, pruritus, urticaria,
rash

META:
Hyperkalemia
, hypocalcemia, hypoglycemia, hypomagnesemia

MISC:
Fatigue, fever, chills, night sweats,
anaphylaxis, Stevens-Johnson syndrome

RESP:
Cough, SOB,
bronchospasm
(with aerosol), sore throat

PHARMACOKINETICS

IV:
Peak 1 hr

IM:
Peak 30 min

Excreted unchanged in urine (66%); half-life 9-12 hr (IM), 6 hr (IV)

INTERACTIONS

• 
Nephrotoxicity: aminoglycosides, amphotericin B, CISplatin, NSAIDs, vancomycin

 
Fatal dysrhythmias: erythromycin IV

Increase:
QT prolongation—class IA/III antidysrhythmics, some phenothiazines, β-agonists, local anesthetics, tricyclics, haloperidol, chloroquine, droperidol, pentamidine; CYP3A4 inhibitors (amiodarone, clarithromycin, erythromycin, telithromycin, troleandomycin, arsenic trioxide, levomethadyl); CYP3A4 substrates (methadone, pimozide, QUEtiapine, quiNIDine, risperiDONE, ziprasidone)

Increase:
myelosuppression—antineoplastics, radiation

Drug/Lab Test

Decrease:
WBC, platelets, Hbg, Hct

Increase:
BUN, creatitine

NURSING CONSIDERATIONS
Assess:

• 
Blood tests, blood glucose, CBC, platelets, calcium, magnesium

• 
I&O ratio; report hematuria, oliguria

• 
ECG for cardiac dysrhythmias; patient should be lying down when receiving product; severe hypotension may develop; monitor B/P during administration and until B/P stable

• 
Hepatic studies: AST, ALT

• 
Renal studies: urinalysis, BUN, creatinine; nephrotoxicity may occur; any patient with compromised renal system; product is excreted slowly with poor renal system function; toxicity may occur rapidly

• 
Signs of infection, anemia

• 
Bowel pattern before, during treatment

• 
Sterile abscess, pain at inj site

• 
Respiratory status: rate, character, wheezing, dyspnea

• 
Dizziness, confusion, hallucination

• 
Allergies before treatment, reaction of each medication; place allergies on chart in bright red letters; notify all people giving products

• 
Diabetic patients, hypoglycemia may occur, then hyperglycemia with prolonged therapy

Perform/provide:

• 
Storage in refrigerator protected from light

Evaluate:

• 
Therapeutic response: resolution of AIDS-related PCP

Teach patient/family:

• 
To report sore throat, fever, fatigue (may indicate superinfection)

• 
To maintain adequate fluid intake

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

HIGH ALERT
pentazocine (Rx)

(pen-taz′oh-seen)

Talwin, Talwin NX

Func. class.:
Opiate analgesic, antagonist

Chem. class.:
Synthetic benzomorphan

 

Controlled Substance Schedule IV
ACTION:

Inhibits ascending pain pathways in CNS, increases pain threshold, alters pain perception

USES:

Moderate to severe pain

CONTRAINDICATIONS:

Hypersensitivity to this product or sulfites; addiction (opiate)

Precautions:
Pregnancy (C), breastfeeding, children <18 yr, addictive personality, increased intracranial pressure, MI (acute), severe heart disease, respiratory depression, renal/hepatic disease, seizure disorder, head trauma, bowel impaction, geriatric patients

DOSAGE AND ROUTES
Calculator

• Adult:
IV/IM/SUBCUT
30 mg q3-4hr prn, max 360 mg/day

Labor

• Adult:
IM
30 mg as a single dose;
IV
20 mg q2-3hr when contractions are regular, max 2-3 times

Renal dose

• Adult:
CCr 10-50 ml/min, reduce dose by 25%; CCr <10 ml/min, reduce dose by 50%

Available forms:
Inj 30 mg/ml

Administer:

• 
With antiemetic if nausea, vomiting occur

• 
When pain is beginning to return; determine dosage interval by patient response

IM/SUBCUT route

• 
Give IM deeply into large muscle mass, rotate sites; SUBCUT may cause necrosis with repeated inj

Direct IV route

• 
Undiluted or diluted in 5 mg/ml of sterile water for inj; give ≤5 mg over 1 min

Syringe compatibilities:
Atropine, benzquinamide, butorphanol, chlorproMAZINE, cimetidine, dimenhyDRINATE, diphenhydrAMINE, droperidol, fentaNYL, HYDROmorphone, hydrOXYzine, meperidine, metoclopramide, morphine, perphenazine, prochlorperazine, promazine, promethazine, ranitidine, scopolamine

Y-site compatibilities:
Heparin, hydrocortisone, potassium chloride, vit B/C

SIDE EFFECTS

CNS:
Drowsiness, dizziness, confusion, headache, sedation, euphoria
, hallucinations, dreaming, insomnia, lightheadedness

CV:
Palpitations, bradycardia, change in B/P, tachycardia, increased B/P (high doses), hypotension, syncope, flushing

EENT:
Tinnitus, blurred vision, miosis, diplopia

GI:
Nausea
, vomiting, anorexia, constipation,
cramps
, dry mouth

GU:
Increased urinary output, dysuria, urinary retention

HEMA:
Eosinophilia, decreased WBC

INTEG:
Rash
, urticaria, bruising, flushing, diaphoresis, pruritus, severe irritation at inj sites,
Stevens-Johnson syndrome

RESP:
Respiratory depression

PHARMACOKINETICS

Metabolized by liver, excreted by kidneys, crosses placenta, half-life 2-3 hr, extensive first-pass metabolism with <20% entering circulation

IM/SUBCUT:
Onset 15-30 min, peak 1-2 hr, duration 2-4 hr

IV:
Onset 2-3 min, duration 4-6 hr

INTERACTIONS

 
Unpredictable reactions: MAOIs

Increase:
effects—CNS depressants; alcohol, sedative/hypnotics, antipsychotics, skeletal muscle relaxants

Decrease:
effects—opiates

Drug/Lab Test

Increase:
amylase

NURSING CONSIDERATIONS
Assess:

• 
Pain:
intensity, duration, location prior to and 1 hr after SUBCUT/IM dose or 30 min after IV dose

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

• 
Bowel status: constipation; may need stimulant laxatives/stool softeners

• 
Withdrawal symptoms
in opiate-dependent patients

• 
Abscesses, ulcerations, WBC count

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

• 
Allergic reactions: rash, urticaria

• 
Respiratory depression:
character, rate, rhythm; notify prescriber if respirations are <10/min

• 
Need for pain medication, physical dependence

Perform/provide:

• 
Storage in light-resistant area at room temp

• 
Assistance with ambulation

• 
Safety measures: nightlight, call bell within easy reach

Evaluate:

• 
Therapeutic response: decrease in pain

Teach patient/family:

• 
To report any symptoms of CNS changes, allergic reactions

• 
That physical dependency may result from extended use

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

• 
To avoid CNS depressants, alcohol

• 
To avoid driving, operating machinery if drowsiness occurs

• 
To use good oral hygiene, frequent rinsing of mouth to decrease dry mouth; to avoid gum, candy if drowsy

TREATMENT OF OVERDOSE:

Naloxone (Narcan) 0.2-0.8 mg IV, O
2
, IV fluids, vasopressors

Other books

Vibrizzio by Nicki Elson
Artfully Yours by Isabel North
Turn It Up by Arend, Vivian
In Bitter Chill by Sarah Ward
Warrior Rising by Linda Winstead Jones
The Passage by Irina Shapiro
The Sisters of Versailles by Sally Christie
Bloodstone by Holzner, Nancy