Mosby's 2014 Nursing Drug Reference (178 page)

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fluconazole (Rx)

(floo-kon′a-zole)

Diflucan

Func. class.:
Antifungal, systemic; azole

Chem class:
Triazole

Do not confuse:
Diflucan
/Diprivan

ACTION:

Inhibits ergosterol biosynthesis, causes direct damage to fungal membrane phospholipids

USES:

Oropharyngeal candidiasis, chronic mucocutaneous candidiasis; sys
temic, vaginal, urinary candidiasis; cryptococcal meningitis; prevention of candidiasis in bone marrow transplant in those who receive chemotherapy and/or radiation therapy; cystitis, fungal prophylaxis, peritonitis, pneumonia, pyelonephritis

Unlabeled uses:
Prophylaxis, systemic candidiasis in very-low-birthweight premature infants, blastomycosis, chemotherapy-induced neutropenia, coccidioidomycosis cryptococcosis prophylaxis, endocarditis, endophthalmitis, histoplasmosis infectious arthritis, myocarditis, osteomyelitis, pericarditis

CONTRAINDICATIONS:

Hypersensitivity to this product or azoles, pregnancy (D)

Precautions:
Breastfeeding, renal/hepatic disease, torsades de pointes

DOSAGE AND ROUTES
Calculator
Vulvovaginal candidiasis

• Adult:
PO
150 mg as a single dose

Serious fungal infections

• Adult:
PO/IV
50-400 mg initially then 200 mg/day for 4 wk

• Child:
6-12 mg/kg/day

Oropharyngeal candidiasis

• Adult:
PO/IV
200 mg initially then 100 mg/day for ≥2 wk

• Child:
PO/IV
6 mg/kg initially then 3 mg/kg/day for ≥2 wk

Esophageal candidiasis

• Adult:
PO/IV
200 mg on 1st day, then 100 mg daily × ≥3 wk and for ≥2 wk after resolution of symptoms

• Child:
PO/IV
6 mg/kg on 1st day, then 3 mg/kg × ≥3 wk and for ≥2 wk after resolution of symptoms

Cryptococcal meningitis

• Adult:
PO/IV
400 mg on 1st day, then 200 mg daily × 10-12 wk after CSF culture negative

• Child/infants/neonates ≥14 days:
PO/IV
12 mg/kg on 1st day, then 6-12 mg/kg daily × 10-12 wk after CSF culture negative, max 600 mg/day

• Neonates 0-14 days:
PO/IV
12 mg/kg on 1st day, then 6-12 mg/kg q72hr × 10-12 wk after CSF culture negative

Prevention of candidiasis in bone marrow transplant

• Adult:
PO/IV
400 mg/day

Renal disease

• Adult:
PO/IV
CCr ≤50 ml/min, after loading dose, give 50% of usual dose

Available forms:
Tabs 50, 100, 150, 200 mg; inj 2 mg/ml; powder for oral susp 50, 200 mg/ml

Administer:
PO route

• 
Tap bottle to loosen powder, add 24 ml distilled or purified water to bottles with 0.35 or 1.4 g drug, shake well, conc 50 or 200 mg/5 ml, respectively

• 
Shake oral susp before each use

Intermittent IV INF route

• 
After diluting according to package directions; run at ≤200 mg/hr; do not use plastic containers in connections; check for bag leaks

• 
Use inf pump; check for extravasation and necrosis q2hr

• 
Do not use if cloudy or precipitated

• 
Do not admix; do not refrigerate

Y-site compatibilities:
Acyclovir, aldesleukin, alfentanil, allopurinol, amifostine, amikacin, aminocaproic acid, aminophylline, amiodarone, anidulafungin, ascorbic acid injection, atenolol, atracurium, atropine, azaTHIOprine, aztreonam, benztropine, bivalirudin, bleomycin, bumetanide, buprenorphine, butorphanol, calcium chloride, CARBOplatin, caspofungin, cefamandole, ceFAZolin, cefepime, cefmetazole, cefonicid, cefoperazone, cefoTEtan, cefOXitin, cefpirome, cefTAZidime, ceftizoxime, ceftobiprole, cephalothin, cephapirin, chlorproMAZINE, cimetidine, cisatracurium, CISplatin, codeine, cyanocobalamin, cyclophosphamide, cycloSPORINE, cytarabine, DACTINomycin, DAPTOmycin, dexamethasone, diltiazem, dimenhyDRINATE, diphenhydrAMINE, DOBUTamine, DOCEtaxel, DOPamine, doripenem, doxacurium, DOXOrubicin, DOXOrubi
cin liposomal, doxycycline, droperidol, drotrecogin alfa, enalaprilat, ePHEDrine, EPINEPHrine, epirubicin, epoetin alfa, eptifibatide, ertapenem, erythromycin, esmolol, etoposide, famotidine, fenoldopam, fentaNYL, filgrastim, fludarabine, fluorouracil, folic acid, foscarnet, gallium, ganciclovir, gatifloxacin, gemcitabine, gentamicin, glycopyrrolate, granisetron, heparin, hydrocortisone, HYDROmorphone, IDArubicin, ifosfamide, IV immune globulin, inamrinone, indomethacin, insulin (regular), irinotecan, isoproterenol, ketorolac, labetalol, lansoprazole, leucovorin, levofloxacin, lidocaine, linezolid, LORazepam, LR, magnesium sulfate, mannitol, mechlorethamine, melphalan, meperidine, meropenem, metaraminol, methicillin, methotrexate, methoxamine, methyldopate, methylPREDNISolone, metoclopramide, metoprolol, metroNIDAZOLE, mezlocillin, miconazole, midazolam, milrinone, minocycline, mitoXANtrone, morphine, moxalactam, multiple vitamins injection, mycophenolate, nafcillin, nalbuphine, naloxone, nesiritide, nitroglycerin, nitroprusside, norepinephrine, octreotide, ondansetron, oxacillin, oxaliplatin, oxytocin, PACLitaxel, palonosetron, pamidronate, pancuronium, papaverine, PEMEtrexed, penicillin G potassium/sodium, pentazocine, PENTobarbital, PHENobarbital, phenylephrine, phenytoin, phytonadione, piperacillin-tazobactam, polymyxin B, potassium chloride, procainamide, prochlorperazine, promethazine, propofol, propranolol, protamine, pyridoxine, quiNIDine, quinupristin-dalfopristin, ranitidine, remifentanil, Ringer’s, ritodrine, riTUXimab, rocuronium, sargramostim, sodium acetate/bicarbonate, succinylcholine, SUFentanil, tacrolimus, temocillin, teniposide, theophylline, thiotepa, ticarcillin-clavulanate, tigecycline, tirofiban, TNA, tobramycin, tolazoline, TPN, trastuzumab, trimetaphan, urokinase, vancomycin, vasopressin, vecuronium, verapamil, vinCRIStine, vinorelbine, voriconazole, zidovudine, zoledronic acid

SIDE EFFECTS

CNS:
Headache,
seizures

CV:
QT prolongation, torsades de pointes

GI:
Nausea, vomiting, diarrhea, cramping, flatus, increased AST, ALT,
hepatotoxicity

HEMA:
Agranulocytosis, eosinophilia, leukopenia, neutropenia, thrombocytopenia

INTEG:
Stevens-Johnson syndrome, angioedema, anaphylaxis, exfoliative dermatitis, toxic epidermal necrolysis

PHARMACOKINETICS

Peak 2-4 hr, bioavailability (PO) >90%, excreted unchanged in urine 80%, metabolized by CYP3A enzyme system at dose >200 mg/day, elimination half-life 30 hr

INTERACTIONS

Increase:
hypoglycemia—oral antidiabetics

Increase:
anticoagulation—warfarin

Increase:
plasma concentrations—cycloSPORINE, phenytoin, theophylline, rifabutin, tacrolimus, sirolimus

Increase:
myopathy, rhabdomyolysis risk—lovastatin, simvastatin

Increase:
effect of zidovudine, methadone, SUFentanil, alfentanil, buprenorphine, saquinavir, fentaNYL, ergots

Decrease:
effect of oral contraceptives, calcium channel blockers

NURSING CONSIDERATIONS
Assess:

• 
Infection:
clearing of CSF and other culture during treatment, obtain C&S baseline and throughout treatment, product may be started as soon as culture is taken

 
Hepatotoxicity:
increasing AST, ALT, periodically alk phos, bilirubin; for renal status: BUN, creatinine

Perform/provide:

• 
Storage protected from moisture and light; diluted sol stable 24 hr; do not freeze

Evaluate:

• 
Therapeutic response: decreasing oral candidiasis, fever, malaise, rash; negative C&S for infection organism

Teach patient/family:

• 
That long-term therapy may be needed to clear infection

• 
That medication may be taken with food to reduce GI effects

• 
To notify prescriber of nausea, vomiting, diarrhea, jaundice, anorexia, clay-colored stools, dark urine

• 
To use alternative method of contraception while taking this product, pregnancy (D)

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

RARELY USED
fludarabine (Rx)

(floo-dar′a-been)

Fludara, Oforta

Func. class.:
Antineoplastic, antimetabolite

USES:

Chronic lymphocytic leukemia, non-Hodgkin’s lymphoma

CONTRAINDICATIONS:

Pregnancy (D), breastfeeding, hypersensitivity

 

Black Box Warning:

Hemolytic anemia, bone marrow suppression, coma, seizures, visual disturbances

DOSAGE AND ROUTES
Calculator

• Adult:
IV
25 mg/m
2
over 30 min × 5 days, may repeat q28days; reconstitute with 2 ml of sterile water for inj; dissolution should occur in <15 sec, adjust dose based on toxicity;
PO
40 mg/m
2
× 5 days q28days

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

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