Mosby's 2014 Nursing Drug Reference (136 page)

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DOBUTamine (Rx)

(doe-byoo′ta-meen)

Func. class.:
Adrenergic direct-acting β
1
-agonist, cardiac stimulant

Chem. class.:
Catecholamine

Do not confuse:
DOBUTamine
/DOPamine

ACTION:

Causes increased contractility, increased cardiac output without marked increase in heart rate by acting on β
1
-receptors in heart; minor α and β
2
effects

USES:

Cardiac decompensation due to organic heart disease or cardiac surgery

Unlabeled uses:
Cardiogenic shock in children; congenital heart disease in children undergoing cardiac catheterization

CONTRAINDICATIONS:

Hypersensitivity, idiopathic hypertrophic subaortic stenosis

Precautions:
Pregnancy (B), breastfeeding, children, hypertension, CAD, MI, hypovolemia, dysrhythmias, sulfite hypersensitivity, renal failure, geriatric patients

DOSAGE AND ROUTES
Calculator

• Adult and child: IV INF
0.5-1 mcg/kg/min; titrate to 2-20 mcg/kg/min may increase to 40 mcg/kg/min if needed

Available forms:
Inj 12.5 mg/ml, 250 mg/20 ml

Administer:
Injectable

• 
Visually inspect parenteral products for particulate matter and discoloration before administration whenever solution and container permit

IV route

Note:
Infusions ≤72 hr have been given without development of tolerance. However, beta-receptor desensitization can occur with prolonged infusions of any beta-adrenergic agonist, including DOBUTamine, or as a consequence of sympathetic compensatory mechanisms associated with advanced congestive heart failure, resulting in alterations in DOBUTamine pharmacodynamics. Experience with intravenous DOBUTamine in controlled trials does not extend beyond 48 hr of repeated boluses and/or continuous infusions.

• 
Must be diluted before administration

• 
Infuse into a large vein

Dilution

• 
Concentrate for injection must be diluted with ≥50 ml of a compatible IV solution (strongly alkaline [e.g., sodium bicarbonate] solutions are incompatible). A common dilution is 500 mg (40 ml) in 210 ml D
5
W or NS (withdraw 40 ml from a 250 ml bag) to produce a final concentration of 2000 mcg/ml; or 1000 mg (80 ml) in 170 ml D
5
W or NS (withdraw 80 ml from a 250 ml bag) to produce a final concentration of 4000 mcg/ml. Maximum concentration should not exceed 5000 mcg/ml and should be adjusted according to the patient’s fluid requirements.

Infusion

• 
Administer diluted solution by IV inf using a controlled-infusion device.

• 
Premixed bags of DOBUTamine in D
5
W solutions can exhibit a pink color that increase with time. This color change is due to slight oxidation of the drug, but there is no significant loss of potency

• 
Do not administer DOBUTamine simultaneously with solutions containing sodium bicarbonate or strong alkaline solutions (incompatible)

• 
Infusion of DOBUTamine should be started at a low rate and titrated frequently to reach the optimal dosage (see Dosage). Dosage titration is guided by the patient’s response, including systemic blood pressure, urine flow, frequency of ectopic activity, heart rate, and (whenever possible) measurements of cardiac output, central venous pressure, and/or pulmonary capillary wedge pressure

Y-site compatibilities:
Alfentanil, alprostadil, amifostine, amikacin, aminocaproic acid, amiodarone, anidulafun
gin, argatroban, ascorbic acid injection, atenolol, atracurium, atropine, aztreonam, benztropine, bleomycin, bumetanide, buprenorphine, butorphanol, calcium chloride/gluconate, CARBOplatin, caspofungin, chlorproMAZINE, cimetidine, ciprofloxacin, cisatracurium, CISplatin, cladribine, clarithromycin, cloNIDine, codeine, cyanocobalamin, cyclophosphamide, cycloSPORINE, cytarabine, DACTINomycin, DAPTOmycin, dexmedetomidine, digoxin, diltiazem, diphenhydrAMINE, DOCEtaxel, DOPamine, doripenem, doxacurium, DOXOrubicin, DOXOrubicin liposomal, doxycycline, enalaprilat, ePHEDrine, EPINEPHrine, epirubicin, epoetin alfa, eptifibatide, erythromycin, esmolol, etoposide, famotidine, fenoldopam, fentaNYL, fluconazole, fludarabine, gatifloxacin, gemcitabine, gentamicin, glycopyrrolate, granisetron, HYDROmorphone, hydrOXYzine, IDArubicin, ifosfamide, irinotecan, isoproterenol, labetalol, levofloxacin, lidocaine, linezolid, LORazepam, LR, magnesium sulfate, mannitol, mechlorethamine, meperidine, meropenem, metaraminol, methoxamine, methyldopate, methylPREDNISolone, metoclopramide, metoprolol, metroNIDAZOLE, miconazole, milrinone, minocycline, mitoXANtrone, morphine, multiple vitamins injection, mycophenolate mofetil, nafcillin, nalbuphine, naloxone, netilmicin, niCARdipine, nitroglycerin, norepinephrine, octreotide, ondansetron, oxaliplatin, oxytocin, PACLitaxel, palonosetron, pamidronate, pancuronium, papaverine, pentamidine, pentazocine, phenylephrine, polymyxin B, potassium chloride, procainamide, prochlorperazine, promethazine, propofol, propranolol, protamine, pyridoxine, quiNIDine, ranitidine, remifentanil, Ringer’s, ritodrine, riTUXimab, rocuronium, sodium acetate, succinylcholine, SUFentanil, tacrolimus, temocillin, teniposide, theophylline, thiamine, thiotepa, tigecycline, tirofiban, TNA, tobramycin, tolazoline, TPN, trastuzumab, trimetaphan, urokinase, vancomycin, vasopressin, vecuronium, verapamil, vinCRIStine, vinorelbine, voriconazole, zidovudine, zoledronic acid

SIDE EFFECTS

CNS:
Anxiety
, headache, dizziness, fatigue

CV:
Palpitations,
tachycardia,
hyper/hypotension, PVCs, angina

ENDO:
Hypokalemia

GI:
Heartburn, nausea, vomiting

MS:
Muscle cramps (leg)

RESP:
Dyspnea

PHARMACOKINETICS

IV:
Onset 1-2 min, peak 10 min, half-life 2 min, metabolized in liver (inactive metabolites), excreted in urine

INTERACTIONS

Increase:
severe hypertension—guanethidine

Increase:
dysrhythmias—general anesthetics

Increase:
pressor effect, dysrhythmias—atomoxetine, COMT inhibitors, tricyclics, MAOIs, oxytocics

Decrease:
DOBUTamine action—other β-blockers

NURSING CONSIDERATIONS
Assess:


 
Hypovolemia;
if present, correct first; administer cardiac glycoside before DOBUTamine


 
Oxygenation/perfusion deficit:
check B/P, chest pain, dizziness, loss of consciousness


 
Heart failure:
S
3
gallop, dyspnea, neck venous distention, bibasilar crackles in patients with CHF, cardiomyopathy, palpate peripheral pulses; report if extremities become cold or mottled or if peripheral pulses decrease


 
ECG
during administration continuously; if B/P increases, product is decreased; CVP or PCWP, cardiac output during inf; report changes


 
Serum electrolytes, urine output

 
Sulfite sensitivity,
which may be life threatening

Perform/provide:

• 
Storage of reconstituted sol for 24 hr if refrigerated

Evaluate:

• 
Therapeutic response: increased B/P with stabilization, increased urine output

Teach patient/family:

• 
About the reason for product administration;
to report dyspnea, chest pain, numbness of extremities, headache, IV site discomfort

TREATMENT OF OVERDOSE:

Administer a β
1
-adrenergic blocker; reduce IV or discontinue, ensure oxygenation/ventilation; for severe tachydysrhythmias (ventricular), give lidocaine or propranolol

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

DOCEtaxel (Rx)

(doe-se-tax′el)

Taxotere

Func. class.:
Antineoplastic—miscellaneous

Chem. class.:
Taxane

Do not confuse:
Taxotere
/Taxol

ACTION:

Inhibits reorganization of microtubule network needed for interphase and mitotic cellular functions; also causes abnormal bundles of microtubules during cell cycle and multiple esters of microtubules during mitosis

USES:

Locally advanced or metastatic breast cancer, non–small-cell lung cancer, androgen-independent metastatic prostate cancer, postsurgery operable node-positive breast cancer, induction treatment of locally advanced squamous cell of the head and neck

Unlabeled uses:
Malignant melanoma, ovarian cancer, front-line use with bevacizumab for metastatic breast cancer, adjuvant treatment of breast cancer with CARBOplatin and trastuzumab, gastric adenocarcinoma

CONTRAINDICATIONS:

Pregnancy (D), breastfeeding, hypersensitivity to this product, bilirubin exceeding upper normal limit

 

Black Box Warning:

Other products with polysorbate 80, neutropenia of <1500/mm
3

Precautions:
Children, cardiovascular disease, pulmonary disorders, bone marrow depression, herpes zoster, pleural effusion

 

Black Box Warning:

Edema, hepatic disease, lung cancer, taxane hypersensitivity

DOSAGE AND ROUTES:

• 
Other regimens are used

Locally advanced or metastatic breast cancer after failure of other chemotherapy


Adult: IV
60-100 mg/m
2
given over 1 hr q3wk; if neutrophil count is <500 cells/mm
3
for >1 wk, reduce dose by 25%

Operable node-positive breast cancer, adjuvant postsurgery treatment of operable node-positive breast cancer


Adult: IV
(TAC regimen) 75 mg/m
2
1 hr after DOXOrubicin 50 mg/m
2
and cyclophosphamide 500 mg/m
2
q3wk × 6 cycles

Adjuvant treatment of operable stage I-III invasive breast cancer in combination with cyclophosphamide


Adult: IV
(TAC regimen) docetaxel 75 mg/m
2
with cyclophosphamide 600 mg/m
2
q21days × 4 cycles

Locally advanced or metastatic non–small-cell lung cancer after failure of CISplatin chemotherapy


Adult: IV
75 mg/m
2
over 1 hr q3wk; if neutrophil count is <500 cells/mm
3
for >1 wk, reduce dose to 55 mg/m
2
; if patient develops grade 3 peripheral neuropathy, stop product

Unreactable, locally advanced, or metastatic non–small-cell lung cancer previously treated with chemotherapy


Adult: IV
75 mg/m
2
over 1 hr then CISplatin 75 mg/m
2
IV
given over 30-60 min q3wk; reduce dose to 65 mg/m
2
in those with hematologic or non-hematologic toxicities

Androgen-independent metastatic prostate cancer


Adult: IV
75 mg/m
2
given over 1 hr q3wk with 5 mg predniSONE
PO
bid continuously; give dexamethasone 8 mg
PO
at 12 hr, 3 hr, and 1 hr prior to docetaxel; if neutrophil count is <500 cells/mm
3
for more than 1 wk or other toxicities occur, reduce dose to 60 mg/m
2

Squamous cell of head and neck


Adult: IV
75 mg/m
2
over 1 hr, then CISplatin 100 mg/m
2
over 1 hr on day 1, then 5FU 1000 mg/m
2
/day
CONT INF
× 5 days, repeat cycle q3wk

Gastric adenocarcinoma


Adult: IV
75 mg/m
2
q3wk, given with CISplatin, fluorouracil

Advanced ovarian cancer/metastatic melanoma (unlabeled)


Adult: IV
100 mg/m
2
over 1 hr q3wk

Available forms:
Inj 20 mg/0.5 ml, 20 mg/ml, 80 mg/2 ml, 80 mg/4 ml

Administer:

• 
Premedicate with dexamethasone 8 mg
PO
bid × 3 days starting 1 day prior to treatment

• 
Antiemetic 30-60 min before product and prn

Intermittent IV INF route

• 
Use cytotoxic handling procedures

• 
Use non-PVC bag and use non-DEHP tubing

• 
Allow vials to warm to room temp; withdraw all diluent, inject in vial of docetaxel; rotate gently to mix; allow to stand to decrease foaming, then withdraw the required amount (10 mg/ml), inject in 250 ml of 0.9% NaCl, D
5
W; mix gently; give over 1 hr

Y-site compatibilities:
Acyclovir, alfentanil, allopurinol, amifostine, amikacin, aminocaproic acid, aminophylline, amiodarone, amphotericin B lipid complex, ampicillin, ampicillin-sulbactam, anidulafungin, atenolol, atracurium, azithromycin, aztreonam, bivalirudin, bleomycin, bumetanide, buprenorphine, busulfan, butorphanol, calcium chloride/gluconate, CARBOplatin, carmustine, caspofungin, ceFAZolin, cefepime, cefonicid, cefoperazone, cefotaxime, cefoTEtan, cefOXitin, cefTAZidime, ceftizoxime, cefTRIAXone, cefuroxime, cephapirin, chloramphenicol, chlorproMAZINE, cimetidine, ciprofloxacin, cisatracurium, CISplatin, clindamycin, codeine, cyclophosphamide, cycloSPORINE, cytarabine, dacarbazine, DACTINomycin, DAPTOmycin, dexamethasone, dexmedetomidine, dexrazoxane, diazepam, digoxin, diltiazem, diphenhydrAMINE, DOBUTamine, DOPamine, doripenem, doxacurium, DOXOrubicin HCL, doxycycline, droperidol, enalaprilat, ePHEDrine, EPINEPHrine, epirubicin, ertapenem, erythromycin, esmolol, etoposide, famotidine, fenoldopam, fentaNYL, fluconazole, fludarabine, fluorouracil, foscarnet, fosphenytoin, furosemide, ganciclovir, gatifloxacin, gemcitabine, gentamicin, glycopyrrolate, granisetron, haloperidol, heparin, hydrALAZINE, hydrocortisone, HYDROmorphone, hydrOXYzine, ifosfamide, imipenem-cilastatin, inamrinone, insulin (regular), irinotecan, isoproterenol, ketorolac, labetalol, leucovorin, levofloxacin, levorphanol, lidocaine, linezolid, LORazepam, LR, magnesium sulfate, mannitol, meperidine, meropenem, mesna, methotrexate, methyldopate, metoclopramide, metoprolol, metroNIDAZOLE, midazolam, milrinone, minocycline, mitoXANtrone, mivacurium, morphine, nafcillin, naloxone, nesiritide, netilmicin, niCARdipine, nitroglycerin, nitroprusside, norepinephrine, octreotide, ofloxacin, ondansetron, oxaliplatin, palonosetron, pamidronate, pancuronium, pantoprazole, PEMEtrexed, pentamidine,
pentazocine, PENTobarbital, PHENobarbital, phenylephrine, piperacillin, piperacillin-tazobactam, polymyxin B, potassium chloride/phosphates, procainamide, prochlorperazine, promethazine, propranolol, quiNIDine, quinupristin-dalfopristin, ranitidine, remifentanil, riTUXimab, rocuronium, sodium acetate/bicarbonate/phosphates, succinylcholine, SUFentanil, sulfamethoxazole-trimethoprim, tacrolimus, teniposide, theophylline, thiopental, thiotepa, ticarcillin, ticarcillin-clavulanate, tigecycline, tirofiban, tobramycin, tolazoline, trastuzumab, trimethobenzamide, vancomycin, vasopressin, vecuronium, verapamil, vinCRIStine, vinorelbine, voriconazole, zidovudine, zoledronic acid

SIDE EFFECTS

CNS:
Seizures

CV:
Hypotension, fluid retention, peripheral edema
, flushing,
MI, sinus tachycardia

GI:
Nausea, vomiting, diarrhea
,
hepatotoxicity,
stomatitis, colitis

HEMA:
Neutropenia, leukopenia, thrombocytopenia, anemia,
bleeding, infections,
myelosuppression

INTEG:
Alopecia
, nail pain, rash, skin eruptions

MISC:
Amenorrhea, fever of unknown origin,
secondary malignancy, Stevens-Johnson syndrome

MS:
Arthralgia, myalgia
, back pain, weakness

NEURO:
Peripheral neuropathy

RESP:
Dyspnea,
pulmonary edema, fibrosis, embolism

SYST:
Hypersensitivity reactions

PHARMACOKINETICS

Metabolized in liver, excreted in feces, terminal half-life 11.1 hr

INTERACTIONS

Increase:
CYP3A inhibition: anastrozole (high doses), aprepitant, fosaprepitant, clarithromycin, conivaptan, delavirdine, efavirenz (induces or inhibits), erythromycin, fluconazole, FLUoxetine, fluvoxaMINE, imatinib, itraconazole, ketoconazole, mibefradil, nefazodone, voriconazole, and others

Increase:
CYP3A induction: barbiturates, bosentan, carBAMazepine, nevirapine, phenytoin, fosphenytoin, rifabutin, rifampin, rifapentine, troglitazone

Increase:
myelosuppression—other antineoplastics, radiation

Decrease:
immune response—live virus vaccines

NURSING CONSIDERATIONS
Assess:

 

Black Box Warning:

CBC, differential, platelet count before treatment and weekly; withhold product if WBC is <1500/mm
3
or platelet count is <100,000/mm
3
; notify prescriber

 

Black Box Warning:

DOCEtaxel, polysorbate 80 hypersensitivity: contraindicated

 

Black Box Warning:

Edema: oral corticosteroids should be given as premedication, assess for fluid retention

 

Black Box Warning:

Lung cancer: increased mortality in those with increased LFTs and a history of platinum-based products

• 
Monitor temp; fever may indicate beginning of infection

 

Black Box Warning:

Hepatic disease:
hepatic studies before, during therapy (bilirubin, AST, ALT, LDH) prn or monthly; check for jaundiced skin and sclera, dark urine, clay-colored stools, itchy skin, abdominal pain, fever, diarrhea

• 
CNS changes:
confusion, paresthesias, peripheral neuropathy, dysethenia, pain, weakness; if severe, product should be discontinued

• 
VS during 1st hr of inf, check IV site for signs of infiltration

 

Black Box Warning:

Hypersensitive reactions, anaphylaxis,
including hypotension, dyspnea, angioedema, generalized urticaria; discontinue infusion immediately


 
Bone marrow depression/bleeding:
hematuria, guaiac, bruising or petechiae, mucosa or orifices q8hr; obtain prescription for viscous lidocaine (Xylocaine); avoid invasive procedures

• 
Effects of alopecia on body image; discuss feelings about body changes

Perform/provide:


 
Confirmation that dexamethasone was given 12 hr and 6 hr before inf begins

• 
Storage of prepared sol up to 27 hr in refrigerator

Evaluate:

• 
Therapeutic response: decreased tumor size, spread of malignancy

Teach patient/family:


 
To report signs of
infection:
fever, sore throat, flulike symptoms


 
To report signs of
anemia:
fatigue, headache, faintness, SOB, irritability


 
To report
bleeding;
to avoid use of razors, commercial mouthwash

• 
To avoid use of aspirin, ibuprofen

• 
That hair may be lost during treatment; that a wig or hairpiece may make patient feel better; that new hair may be different in color and texture

• 
That pain in muscles and joints 2-5 days after inf is common


 
To use barrier contraception during and for several months after treatment, pregnancy (D); to avoid breastfeeding

• 
To avoid receiving vaccinations while taking product

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