Mosby's 2014 Nursing Drug Reference (273 page)

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

misoprostol (Rx)

(mye-soe-prost′ole)

Cytotec

Func. class.:
Gastric mucosa protectant, antiulcer

Chem. class.:
Prostaglandin E
1
analog

Do not confuse:
misoprostol
/metoprolol
Cytotec
/Cytoxan

ACTION:

Inhibits gastric acid secretion; may protect gastric mucosa; can increase bicarbonate, mucus production

USES:

Prevention of NSAID-induced gastric ulcers

Unlabeled uses:
Pregnancy termination, postpartum hemorrhage, cervical ripening/labor induction (vaginal), active duodenal/gastric ulcer, kidney transplant rejection prophylaxis

CONTRAINDICATIONS:

Hypersensitivity to this product or prostaglandins

 

Black Box Warning:

Pregnancy (X), females

Precautions:
Breastfeeding, children, geriatric patients, renal/CV disease, abnormal fetal position, cardiac/renal/inflammatory bowel disease, C-section, dehydration, diarrhea, fever, ectopic pregnancy, fetal distress, sepsis, vaginal bleeding

DOSAGE AND ROUTES
Calculator

• Adult:
PO
200 mcg qid with food for duration of NSAID therapy, with last dose given at bedtime; if 200 mcg is not tolerated, 100 mcg may be given

Active duodenal/gastric ulcer (unlabeled)

• Adult:
PO
100-200 mcg qid with meals at bedtime × 4-8 wk

Pregnancy termination prior to 63rd day (unlabeled)

• Adult:
INTRAVAGINALLY
800 mcg 5-7 days after methotrexate IM

Cervical ripening induction for term pregnancy (unlabeled)

• Adult:
INTRAVAGINALLY
25 mcg q3-6hr

Available forms:
Tabs 100, 200 mcg

Administer:

• 
PO with meals for prolonged product effect; avoid use of magnesium antacids

SIDE EFFECTS

GI:
Diarrhea
, nausea, vomiting, flatulence, constipation, dyspepsia, abdominal pain

GU:
Spotting, cramps, hypermenorrhea, menstrual disorders

PHARMACOKINETICS

PO:
Peak 12 min, plasma steady state achieved within 2 days, excreted in urine

INTERACTIONS
Drug/Food

Decrease:
maximum concentrations when taken with food

NURSING CONSIDERATIONS
Assess:

• 
NSAID-induced ulcer prophylaxis:
monitor GI symptoms (hematemesis, occult or frank blood in stools, gastric aspirate, cramping, severe diarrhea)

 

Black Box Warning:

Pregnancy (X): Obtain a negative pregnancy test; miscarriages are common

Perform/provide:

• 
Storage at room temp

Evaluate:

• 
Therapeutic response: absence of pain or GI complaints; prevention of ulcers

Teach patient/family:

• 
To take only as directed; to read patient information leaflet

 

Black Box Warning:

Not to take if pregnant (can cause miscarriage) (X); not to become pregnant while taking product; if pregnancy occurs during therapy, discontinue product, notify prescriber; not to breastfeed

• 
Not to give product to anyone else or to take for more than 4 wk unless directed by prescriber

• 
To avoid OTC preparations: aspirin, cough, cold products; condition may worsen

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

HIGH ALERT
mitoMYcin (Rx)

(mye-toe-mye′sin)

Mitosol

Func. class.:
Antineoplastic, antibiotic

Do not confuse:
mitoMYcin
/mithramycin/mitotane/mitoXANtrone

ACTION:

Inhibits DNA synthesis, primarily; derived from
Streptomyces caespitosus;
appears to cause cross-linking of DNA; vesicant

USES:

Pancreatic, stomach, colorectal, bladder cancer

Unlabeled uses:
Palliative treatment of anal, bladder, head, neck, colon, breast, biliary, cervical, lung malignancies; bone marrow ablation, desmoid tumor, mesothelioma, stem cell transplant preparation

CONTRAINDICATIONS:

Pregnancy (D) 1st trimester, breastfeeding, hypersensitivity, as single agent, coagulation disorders

 

Black Box Warning:

Thrombocytopenia

Precautions:
Accidental exposure, acute bronchospasm, anemia, children, dental disease/work, extravasation, females, infection, radiation therapy, surgery, vaccines, renal/respiratory disease

 

Black Box Warning:

Bone marrow suppression, hemolytic-uremic syndrome

DOSAGE AND ROUTES
Calculator

• Adult:
IV
20 mg/m
2
q6-8wk

Available forms:
Inj 5, 20, 40 mg/vial

Administer:
Direct IV route

• 
Use port, or central line if possible

• 
Antiemetic 30-60 min before product to prevent vomiting

• 
IV after diluting 5 mg/10 ml, 20 mg/ 40 ml, 40 mg/80 ml (0.5 mg/ml) sterile water for inj; shake, allow to stand, give through
Y
-tube or 3-way stopcock; give slow IV push or infuse over 15-30 min; color of reconstituted sol is gray

• 
Avoid excessive heat, store reconstituted product in refrigerator, discard after 2 wk, store unreconstituted product at room temp

Y-site compatibilities:
Amifostine, amphotericin B lipid complex, amphotericin B liposome, anidulafungin, argatroban, atenolol, bivalirudin, bleomycin, caspofungin, CISplatin, cyclophosphamide, DACTINomycin, dolasteron, DOXOrubicin, droperidol, epirubicin, ertapenem, fluorouracil, furosemide, granisetron, heparin, leucovorin, melphalan, methotrexate, metoclopramide, nesiritide, octreotide, ondansetron, oxaliplatin, PACLitaxel, palonosetron, PEMEtrexed, riTUXimab, teniposide, thiotepa, tigecycline, tirofiban, trastuzumab, vinBLAStine, vinCRIStine, voriconazole, zoledronic acid

SIDE EFFECTS

CNS:
Fever, headache, confusion, drowsiness, syncope, fatigue

EENT:
Blurred vision

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

GU:
Urinary retention,
renal failure,
edema

HEMA:
Thrombocytopenia, leukopenia, anemia

INTEG:
Rash
, alopecia,
extravasation,
nail discoloration

MISC:
Hemolytic uremic syndrome, CHF

RESP:
Fibrosis, pulmonary infiltrate,
dyspnea

PHARMACOKINETICS

Half-life 1 hr, metabolized in liver, 10% excreted in urine (unchanged)

INTERACTIONS

Increase:
toxicity—other antineoplastics, radiation

Increase:
bleeding risk—NSAIDs, anticoagulants

• 
Avoid use with vaccines

Drug/Herb

• 
Avoid use with black cohosh

NURSING CONSIDERATIONS
Assess:

 

Black Box Warning:

Bone marrow suppression: CBC, differential, platelet count weekly; withhold product if WBC is <4000/mm
3
, serum creatinine >1.7 mg/dl, or platelet count is <100,000/mm
3
; notify prescriber; bleeding: hematuria, guaiac, bruising, petechiae, mucosa or orifices

 

Black Box Warning:

Fatal hemolytic-uremic syndrome:
hypertension, thrombocytopenia, microangiopathic hemolytic anemia; occurs in those receiving long-term therapy

• 
Renal studies: BUN, serum uric acid, urine CCr, electrolytes before, during therapy, adjust dose based on renal function

• 
I&O ratio; report fall in urine output to <30 ml/hr

• 
Monitor temp q4hr; fever may indicate beginning infection

• 
Hepatic studies before, during therapy: bilirubin, AST, ALT, alk phos as needed or monthly; check for jaundiced skin and sclera, dark urine, clay-colored stools, itchy skin, abdominal pain, fever, diarrhea

 
Pulmonary fibrosis:
bronchospasm, dyspnea, crackles, unproductive cough; chest pain, tachypnea, fatigue, increased pulse, pallor, lethargy; pulmonary function tests; chest x-ray before, during therapy; chest x-ray should be obtained q2wk during treatment

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

• 
Buccal cavity q8hr for dryness, sores, ulceration, white patches, oral pain, bleeding, dysphagia

• 
Local irritation, pain, burning at inj site

• 
GI symptoms: frequency of stools, cramping

Perform/provide:

• 
Adequate fluids 2-3 L/day unless contraindicated

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

Evaluate:

• 
Therapeutic response: decreased tumor size, spread of malignancy

Teach patient/family:

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

• 
To avoid foods with citric acid, hot or rough texture

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

• 
To report sign of IV site reaction, redness, inflammation, burning, pain

• 
To avoid crowds, persons with infections if granulocyte count is low

• 
Infection:
report fever, flulike symptoms, sore throat

• 
To immediately report urine retention, absence of urine, dyspnea, bleeding, jaundice, signs of pulmonary toxicity

• 
To report if pregnancy is planned or suspected; pregnancy (D) 1st trimester, do not breastfeed

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