Mosby's 2014 Nursing Drug Reference (124 page)

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

dexamethasone (Rx)

(dex-ah-meth′a-sone)

Baycadron, Decadron, Dexasone
, DexPak, Maxidex

dexamethasone sodium
phosphate (Rx)

Func. class.:
Corticosteroid, synthetic

Chem. class.:
Glucocorticoid, long acting

Do not confuse:
Decadron
/Percodan

ACTION:

Decreases inflammation by suppression of migration of polymorphonuclear leukocytes, fibroblasts, reversal of increased capillary permeability and lysosomal stabilization, suppresses normal immune response, no mineralocorticoid effects

USES:

Inflammation, allergies, neoplasms, cerebral edema, septic shock, collagen disorders, dexamethasone suppression test for Cushing Syndrome, adrenocortical insufficiency, TB, meningitis, acute exacerbations of MS

CONTRAINDICATIONS:

Hypersensitivity to corticosteroids, sulfites or benzyl alcohol; fungal infections, abrupt discontinuation, coagulopathy, ulcerative colitis, seizure disorders

Precautions:
Pregnancy (C), breastfeeding, diabetes mellitus, osteoporosis, seizure disorders, ulcerative colitis, CHF, myasthenia gravis, renal disease, peptic ulcer, esophagitis, recent MI, hypertension, TB, active hepatitis, psychosis, sulfite hypersensitivity, thromboembolic disorders

DOSAGE AND ROUTES
Calculator
Inflammation


Adult: PO
0.75-9 mg/day in divided doses q6-12hr or phosphate
IM
0.5-9 mg/day divided q6-12hr

• Child: PO
0.024-0.34 mg/kg/day in divided doses q6-12hr

Anaphylactic shock


Adult: IV
(Phosphate) single dose 1-6 mg/kg or
IV
40 mg q2-6hr as needed up to 72 hr

Cerebral edema


Adult: IV
(Phosphate) 10 mg, then 4-6 mg
IM
q6hr × 2-4 days, then taper over 1 wk

• Child:
Loading dose 1-2 mg/kg
(PO/IM/IV)
then 1-1.5 mg/kg/day, max 16 mg/day divided q4-6hr for 2-4 days, then taper down weekly

Adrenocortical insufficiency


Adult: PO
0.75-9 mg/day in divided doses

• Child: PO
0.03-0.3 mg/kg/day in 2-4 divided doses

Suppression test


Adult: PO
1 mg at 11
PM
or 0.5 mg q6hr × 48 hr

ARDS (unlabeled)


Adult: IM/IV
(phosphate) 0.5-9 mg/day in 2-4 divided doses

• Child: IM/IV
0.06-0.3 mg/kg/day or 1.2-10 mg/m
2
in divided doses q6-12hr

Bone pain (unlabeled)


Adult: PO/IV
12-20 mg/day in divided doses

Pediatric bacterial meningitis (unlabeled)

• Child and infant >2 mo: IV
0.15 mg/kg qid × first 2 days of antibiotics

Available forms:
Dexamethasone:
tabs 0.5, 0.75, 1, 1.5, 2, 4, 6 mg; elix 0.5 mg/5 ml; oral sol 0.5 mg/5 ml, 1 mg/1 ml;
sodium phosphate:
4, 10 mg/ml; ophth implant 0.7 mg; ophth susp drops/solution 0.1%

Administer:
PO route

• 
Titrated dose; use lowest effective dose

• 
With food or milk to decrease GI symptoms

IM route

• 
IM inj deeply in large muscle mass; rotate sites; avoid deltoid; use 21G needle

• 
In 1 dose in
AM
to prevent adrenal suppression; avoid SUBCUT administration, may damage tissue

Direct IV route (sodium phosphate)

• 
Undiluted direct over ≤1 min

Intermittent IV INF route

• 
Diluted with 0.9% NaCl or D
5
W, give as IV inf at prescribed rate

Dexamethasone sodium phosphate
Syringe compatibilities:

Acetaminophen, caffeine, dimenhydrAMINE, furosemide, granisetron, hyaluronidase, ketamine, metoclopramide, octreotide, oxyCODONE, palonosetron, ranitidine, salbutamol, SUFentanil, traMADol

Y-site compatibilities:
Acetaminophen, acyclovir, alfentanil, allopurinol, amifostine, amikacin, aminocaproic acid, ami
nophylline, amphotericin B cholesteryl, amphotericin B lipid complex, amphotericin B liposome, amsacrine, anidulafungin, argatroban, ascorbic acid injection, atenolol, atracurium, atropine, aztreonam, benztropine, bivalirudin, bleomycin, bumetanide, buprenorphine, butorphanol, caffeine, CARBOplatin, carmustine, cefamandole, ceFAZolin, cefepime, cefmetazole, cefonicid, cefoperazone, cefotaxime, cefoTEtan, cefOXitin, cefpirome, ceftaroline, cefTAZidime, ceftizoxime, ceftobiprole, cefTRIAXone, chloramphenicol, cimetidine, cisatracurium, CISplatin, cladribine, clindamycin, codeine, cyanocobalamin, cyclophosphamide, cycloSPORINE, cytarabine, DACTINomycin, DAPTOmycin, DAUNOrubicin, dexmedetomidine, digoxin, diltiazem, DOCEtaxel, DOPamine, doripenem, doxacurium, DOXOrubicin, DOXOrubicin liposomal, enalaprilat, ePHEDrine, EPINEPHrine, epoetin alfa, eptifibatide, ertapenem, etoposide, etoposide phosphate, famotidine, fentaNYL, filgrastim, fluconazole, fludarabine, fluorouracil, folic acid, fosaprepitant, foscarnet, furosemide, ganciclovir, gatifloxacin, gemcitabine, glycopyrrolate, granisetron, heparin, hydrocortisone, HYDROmorphone, ifosfamide, imipenem-cilastatin, indomethacin, insulin (regular), irinotecan, isoproterenol, ketorolac, lansoprazole, leucovorin, levofloxacin, lidocaine, linezolid, liposome, LORazepam, LR, mannitol, mechlorethamine, melphalan, meropenem, metaraminol, methadone, methicillin, methoxamine, methyldopate, methylPREDNISolone, metoclopramide, metoprolol, metroNIDAZOLE, mezlocillin, miconazole, milrinone, morphine, moxalactam, multiple vitamins injection, nafcillin, nalbuphine, naloxone, nitroglycerin, nitroprusside, norepinephrine, octreotide, ondansetron, oxacillin, oxaliplatin, oxyCODONE, oxytocin, PACLitaxel, palonosetron, pamidronate, pancuronium, PEMEtrexed, penicillin G potassium/sodium, PENTobarbital, PHENobarbital, phenylephrine, phytonadione, piperacillin, piperacillin-tazobactam, potassium chloride, procainamide, propofol, propranolol, pyridoxine, ranitidine, remifentanil, Ringer’s, ritodrine, riTUXimab, sargramostim, sodium acetate/bicarbonate, succinylcholine, SUFentanil, tacrolimus, telavancin, teniposide, theophylline, thiamine, thiotepa, ticarcillin, ticarcillin-clavulanate, tigecycline, tirofiban, TNA, tolazoline, topotecan, trastuzumab, trimetaphan, urokinase, vancomycin, vasopressin, vecuronium, verapamil, vinCRIStine, vinorelbine, vitamin B complex/C, voriconazole, zidovudine, zoledronic acid

SIDE EFFECTS

CNS:
Depression, flushing, sweating
, headache, mood changes, euphoria, psychosis,
seizures,
insomnia,
pseudotumor cerebri

CV:
Hypertension
,
circulatory collapse,
tachycardia, edema, cardiomyopathy,
thromboembolism, heart failure, dysrhythmias

EENT:
Fungal infections, increased intraocular pressure, blurred vision, cataracts, glaucoma

ENDO:
HPA suppression, hyperglycemia, sodium, fluid retention

GI:
Diarrhea, nausea, abdominal distention
,
GI hemorrhage,
increased appetite
,
pancreatitis

HEMA:
Thrombocytopenia,
transient leukocytosis,
thromboembolism

INTEG:
Acne, poor wound healing, ecchymosis, petechiae, hirsutism,
angioedema

META:
Hypokalemia

MS:
Fractures, osteoporosis, weakness, arthralgia, myopathy

PHARMACOKINETICS

Half-life 1-2 days

PO:
Onset 1 hr, peak 1-2 hr, duration 2½ days

IM:
Duration 2 days-3 wk

INTERACTIONS

Increase:
toxicity—cycloSPORINE

Increase:
side effects—alcohol, salicylates, amphotericin B, digoxin, cycloSPORINE, diuretics, NSAIDs

Increase:
dexamethasone action—salicylates, estrogens, indomethacin, hormonal contraceptives, ketoconazole, macrolide antiinfectives, NSAIDs

Increase:
tendinitis tendon rupture risk—quinolones

Increase:
effect of—antidiabetics

Decrease:
dexamethasone action—cholestyramine, colestipol, barbiturates, rifampin, ePHEDrine, phenytoin, theophylline, antacids, bosentan, carBAMazepine, ethotoin

Decrease:
anticoagulant effect—anticonvulsants, antidiabetics, ambenonium, neostigmine, isoniazid, toxoids, vaccines, anticholinesterases, salicylates, somatrem

Decrease:
potassium levels—thiazide diuretics

Drug/Lab Test

Increase:
cholesterol, sodium, blood glucose, uric acid, calcium

Decrease:
calcium, potassium, T
4
, T
3
, thyroid
131
I uptake test, urine 17-OHCS, 17-KS, PBI

False negative:
skin allergy tests

NURSING CONSIDERATIONS
Assess:

• 
Potassium, blood, urine glucose while receiving long-term therapy; hypo/hyperglycemia

• 
Weight daily; notify prescriber of weekly gain >5 lb

• 
B/P, pulse; notify prescriber of chest pain

• 
I&O ratio; be alert for decreasing urinary output, increasing edema


 
Cushingoid symptoms:
Assess for buffalo hump, moon face, increased B/P; monitor; plasma cortisol levels during long-term therapy (normal: 138-635 nmol/L SI units when drawn at 8
AM
); prolonged use can cause cushingoid symptoms

• 
Infection:
fever, WBC even after withdrawal of medication; product masks infection

• 
Potassium depletion:
paresthesias, fatigue, nausea, vomiting, depression, polyuria, dysrhythmias, weakness

• 
Edema, hypertension, cardiac symptoms

• 
Mental status:
affect, mood, behavioral changes, aggression


 
Abrupt withdrawal:
acute adrenal insufficiency and death may occur following abrupt discontinuation of systemic therapy; withdraw gradually

Evaluate:

• 
Therapeutic response: decreased inflammation

Teach patient/family:

• 
That ID as corticosteroid user should be carried


 
To contact prescriber if surgery, trauma, stress occurs because dose may need to be adjusted

• 
To notify prescriber if therapeutic response decreases because dosage adjustment may be needed

• 
To take with food or milk

• 
That bruising may occur easily

• 
That if on long-term therapy a high protein diet may be needed

 
Not to discontinue abruptly because
adrenal crisis
can result


 
About symptoms of adrenal insufficiency: nausea, anorexia, fatigue, dizziness, dyspnea, weakness, joint pain

• 
To avoid OTC products: salicylates, alcohol in cough products, cold preparations unless directed by prescriber

• 
About all aspects of product usage, including cushingoid symptoms; to notify health care provider of infection

• 
To avoid exposure to chickenpox or measles, persons with infection

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