Mosby's 2014 Nursing Drug Reference (194 page)

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

gemcitabine (Rx)

(jem-sit′a-been)

Gemzar

Func. class.:
Antineoplastic—miscellaneous

Chem. class.:
Nucleoside analog

Do not confuse:
Gemzar
/Zinecard

ACTION:

Exhibits antitumor activity by killing cells undergoing DNA synthesis (S phase) and blocking G1/S-phase boundary

USES:

Adenocarcinoma of the pancreas (nonresectable stage II, III, or metastatic stage IV); in combination with CISplatin for inoperable, advanced, or metastatic non–small-cell lung cancer; advanced breast cancer in combination with PACLitaxel; with CARBOplatin for ovarian cancer

Unlabeled uses:
Bladder cancer, mesothelioma, adjuvant treatment of pancreatic cancer, ovarian cancer single agent, biliary tract cancer, advanced T-cell lymphoma

CONTRAINDICATIONS:

Pregnancy (D), breastfeeding, hypersensitivity

Precautions:
Children, geriatric patients, myelosuppression, radiation therapy, renal/hepatic disease, accidental exposure, alcoholism, dental disease, infection

DOSAGE AND ROUTES
Calculator
Pancreatic carcinoma (nonresectable stage II, III, IV)

• Adult:
IV
1000 mg/m
2
given over 30 min/wk up to 7 wk then 1 wk rest period; subsequent cycles should be infused 1×/wk × 3 wk out of every 4 wk depending on hematologic toxicity

Non–small-cell lung cancer

• Adult:
IV
(4-wk schedule) 1000 mg/m
2
given over 30 min on days 1, 8, 15, of
each 28-day cycle; give CISplatin
IV
100 mg/m
2
on day 1 after gemcitabine; 3-wk schedule: 1250 mg/m
2
given over 30 min on days 1, 8 of each 21-day cycle; give CISplatin
IV
100 mg/m
2
after the inf of gemcitabine on day 1

Advanced breast cancer

• Adult:
IV
1250 mg/m
2
over 30 min on days 1 and 8 of 21-day cycle; give with PACLitaxel 175 mg/m
2
over 3 hr before gemcitabine on day 1

Recurrent ovarian cancer (single agent) (unlabeled)

• Adult:
IV
1 g/m
2
, days 1, 8, 15 of 28-day cycle

Available forms:
Lyophilized powder for inj 20 mg/ml (10-, 50-ml vials)

Administer:
IV route

• 
Prepare in biologic cabinet using gown, mask, gloves; use cytotoxic handling procedures

• 
After reconstituting with 0.9% NaCl 5 ml/200-mg vial of product or 25 ml/1-g vial of product (38 mg/ml) shake; may be further diluted with 0.9% NaCl to conc as low as 0.1 mg/ml; discard unused portions, give over 30 min, do not admix

• 
Diluted solution stable at room temp for 24 hr, do not refrigerate

• 
Infusions longer than 60 min increase toxicity

• 
Bone marrow depression:
CBC, differential, platelet count before each dose; single agent: absolute granulocyte count >1000 and platelets >100,000, give complete dose; absolute granulocyte count 500-999, platelets 50,000-99,999, give 75%; absolute granulocyte count <500 or platelets <50,000, do not give; combination with PACLitaxel for breast cancer: absolute granulocyte count >1200 and platelets >75,000, give complete dose; absolute granulocyte count 1000-1199 or platelets 50,000-75,000, give 75%; absolute granulocyte 700-999 or platelets ≥50,000, give 50%; granulocyte count <700 or platelet <50,000, do not give; combination with CARBOplatin for ovarian cancer: absolute granulocyte count >1500 and platelet count >100,000, give complete dose; absolute granulocyte count 1000-1499 or platelets 75,000-99,000, give 75%; absolute granulocyte count <1000 or platelets <75,000, do not give

Y-site compatibilities:
Amifostine, amikacin, aminophylline, ampicillin, aztreonam, bleomycin, bumetanide, butorphanol, calcium gluconate, cefOXitin, cefTAZidime, ceftizoxime, cefTRIAXone, chlorproMAZINE, cimetidine, ciprofloxacin, CISplatin, clindamycin, cyclophosphamide, cytarabine, DACTINomycin, DAUNOrubicin, diphenhydrAMINE, DOBUTamine, DOCEtaxel, DOPamine, DOXOrubicin, droperidol, enalaprilat, etoposide, famotidine, floxuridine, fluconazole, fludarabine, fluorouracil, gentamicin, granisetron, haloperidol, heparin, hydrocortisone, HYDROmorphone, IDArubicin, ifosfamide, leucovorin, linezolid, LORazepam, mannitol, meperidine, mesna, metoclopramide, metroNIDAZOLE, minocycline, mitoXANtrone, morphine, nalbuphine, ondansetron, PACLitaxel, promethazine, ranitidine, streptozocin, teniposide, thiotepa, ticarcillin, tobramycin, topotecan, trimethoprim/sulfamethoxazole, vancomycin, vinBLAStine, vinCRIStine, vinorelbine, zidovudine, zoledronic acid

SIDE EFFECTS

ENDO:
Hyperglycemia

GI:
Diarrhea,
nausea, vomiting
, anorexia, constipation, stomatitis

GU:
Proteinuria
, hematuria

HEMA:
Leukopenia, anemia, neutropenia, thrombocytopenia

INTEG:
Irritation at site,
rash, alopecia

META:
Hypocalcemia, hypokalemia, hypomagnesemia

OTHER:
Dyspnea,
fever
,
hemorrhage,
infection, flulike symptoms, paresthesia,
peripheral edema
, myalgia

PHARMACOKINETICS

Half-life 42-379 min, crosses placenta, excretion: renal, 92%-98%

INTERACTIONS

Increase:
bleeding—NSAIDs, alcohol, salicylates, anticoagulants

Increase:
myelosuppression, diarrhea—other antineoplastics, radiation

Decrease:
antibody response—live virus vaccines

Drug/Lab Test

Increase:
BUN, AST, ALT, alk phos, bilirubin, creatinine

Decrease:
Hgb, WBC, neutrophils, platelets

NURSING CONSIDERATIONS
Assess:

• 
Blood dyscrasias:
bruising, bleeding, petechiae

• 
I&O, nutritional intake; food preferences: list likes, dislikes

• 
Renal, hepatic studies before and during treatment; may increase AST, ALT, alk phos, bilirubin, BUN, creatinine, calcium, potassium, glucose, magnesium, urine protein

• 
Buccal cavity for dryness, sores, ulceration, white patches, oral pain, bleeding, dysphagia

• 
GI symptoms: frequency of stools, cramping

• 
Signs of dehydration: rapid respirations, poor skin turgor, decreased urine output, dry skin, restlessness, weakness

Perform/provide:

• 
Increased fluid intake to 2-3 L/day to prevent dehydration unless contraindicated

• 
Rinsing of mouth tid-qid with water, club soda; brushing of teeth bid-tid with soft brush or cotton-tipped applicator for stomatitis; use unwaxed dental floss

• 
Antiemetic agents

Evaluate:

• 
Therapeutic response: decrease in tumor size; decrease in spread of cancer; symptom relief

Teach patient/family:

• 
To avoid foods with citric acid or hot or rough texture if stomatitis is present; to drink adequate fluids; to avoid use with NSAIDs, alcohol, salicylates

• 
To report stomatitis and any bleeding, white spots, ulcerations in mouth; to examine mouth daily, report symptoms

• 
To report signs of anemia: fatigue, headache, faintness, SOB, irritability; hematuria, dysuria

• 
To use contraception during therapy and for 4 mo after; pregnancy (D), do not breastfeed

• 
Not to receive vaccinations during treatment

• 
About possible hair loss and what can be done

• 
To report flulike symptoms, swelling of feet/legs

• 
To report bruising, bleeding: gums, blood in urine, stool, emesis

• 
To avoid crowds, persons with known upper-respiratory infections

• 
To avoid use of hard-bristle toothbrush, electric razor

• 
Infection: to report sore throat, fever, flulike symptoms immediately

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

gemfibrozil (Rx)

(jem-fi′broe-zil)

Lopid

Func. class.:
Antilipemic

Chem. class.:
Fibric acid derivative

Do not confuse:
Lopid
/Levbid/Slo-bid

ACTION:

Inhibits biosynthesis of VLDL, decreases triglycerides, increases HDL

USES:

Type IIb, IV, V hyperlipidemia as adjunct with diet therapy, hypertriglyceridemia

CONTRAINDICATIONS:

Severe renal/hepatic disease, preexisting gallbladder disease, primary biliary cirrhosis, hypersensitivity

Precautions:
Pregnancy (C), breastfeeding; monitor hematologic and hepatic function

DOSAGE AND ROUTES
Calculator

• Adult:
PO
600 mg bid 30 min before
AM
,
PM
meal

Hepatic/renal dose

• 
Avoid use

Available forms:
Tabs 600 mg; caps 300 mg

Administer:
PO route

• 
Should not be used with repaglinide or itraconazole

• 
30 min before
AM
,
PM
meals

• 
Discontinue product if response does not occur within 3 mo

SIDE EFFECTS

CNS:
Fatigue, vertigo, headache, paresthesia, dizziness, somnolence

GI:
Dyspepsia, diarrhea, abdominal pain
, nausea, vomiting

HEMA:
Leukopenia, anemia, eosinophilia, thrombocytopenia

INTEG:
Rash, urticaria, pruritus

MISC:
Taste perversion

MS:
Myopathy, rhabdomyolysis

SYST:
Angioedema, exfoliative dermatitis

PHARMACOKINETICS

Peak 1-2 hr; plasma protein binding >90%; half-life 1½ hr; 70% excreted in urine mostly unchanged; metabolized in liver (minimal)

INTERACTIONS

Increase:
hypoglycemic effect—sulfonylureas, repaglinide

Increase:
anticoagulant properties—warfarin

Increase:
risk of myositis, myalgia—HMG-CoA reductase inhibitors

Decrease:
effect of cycloSPORINE

Decrease:
effect of gemfibrozil—bile acid sequestrants, separate by >2 hr

Drug/Lab Test

Increase:
LFTs, CK

Decrease:
Hgb, Hct, WBC, potassium, eosinophils, platelets

NURSING CONSIDERATIONS
Assess:

• 
Hyperlipidemia: diet history: fats, triglycerides, cholesterol; if lipids increase, product should be discontinued; LDL, VLDL baseline and periodically

• 
Myopathy, rhabdomyolysis:
For muscle pain, tenderness; obtain baseline CPK; if elevated or if these occur, product should be discontinued; at greater risk if combined with HMG-Co-A reductase inhibitors

• 
Renal, hepatic studies, CBC, blood glucose if patient is receiving long-term therapy; if LFTs increase, therapy should be discontinued

• 
Bowel pattern daily; watch for increasing diarrhea (common)

Evaluate:

• 
Therapeutic response: decreased cholesterol, triglyceride levels; HDL, cholesterol ratios improved

Teach patient/family:

• 
That compliance is needed for positive results; not to double or skip dose

• 
That risk factors should be decreased: high-fat diet, smoking, alcohol consumption, absence of exercise

• 
To notify prescriber of diarrhea, nausea, vomiting, chills, fever, sore throat, muscle cramps, abdominal cramps, severe flatulence, tendon pain

• 
To avoid driving, hazardous activities if dizziness, blurred vision occur

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