Mosby's 2014 Nursing Drug Reference (116 page)

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

dantrolene (Rx)

(dan′troe-leen)

Dantrium, Revonto

Func. class.:
Skeletal muscle relaxant, direct acting

Chem. class.:
Hydantoin

Do not confuse:
Dantrium
/danazol

ACTION:

Interferes with intracellular release of calcium from the sarcoplasmic reticulum necessary to initiate contraction; slows catabolism in malignant hyperthermia

USES:

Spasticity in multiple sclerosis, stroke, spinal cord injury, cerebral palsy, malignant hyperthermia

Unlabeled uses:
Neuroleptic malignant syndrome

CONTRAINDICATIONS:

Hypersensitivity, compromised pulmonary function, impaired myocardial function

 

Black Box Warning:

Active hepatic disease

Precautions:
Pregnancy (C), breastfeeding, geriatric patients, peptic ulcer disease, cardiac/renal/hepatic disease, stroke, seizure disorder, diabetes mellitus, ALS, COPD, MS, mannitol/gelatin hypersensitivity, labor, lactase deficiency, extravasation

 

Black Box Warning:

Females >35 yr, with MS, or taking estrogens

DOSAGE AND ROUTES
Calculator
Spasticity


Adult: PO
25 mg/day; may increase to 25-100 mg bid-qid, max 400 mg/day

• Child: PO
0.5 mg/kg/day given in divided doses bid; dosage may increase gradually, max 400 mg/day

Prevention of malignant hyperthermia

• Adult and child: PO
4-8 mg/kg/day in 3-4 divided doses × 1-2 days prior to procedure, give last dose 4 hr preop;
IV
2.5 mg/kg before anesthesia

Malignant hyperthermia

• Adult and child: IV
1-2.5 mg/kg, may repeat to total dose of 10 mg/kg;
PO
4-8 mg/kg/day in 4 divided doses × 1-3 days

Neuroleptic malignant syndrome (unlabeled)


Adult: PO
100-300 mg/day in divided doses;
IV
1.25-1.5 mg/kg

Available forms:
Caps 25, 50, 100 mg; powder for inj 20 mg/vial

Administer:

• 
Avoid use with other CNS depressants

PO route

• 
Do not crush or chew caps

• 
Caps may be opened, mixed with juice and swallowed

• 
With meals for GI symptoms

IV route

• 
IV after diluting 20 mg/60 ml sterile water for inj without bacteriostatic agent (333 mcg/ml); shake until clear; give by rapid IV push through
Y
-tube or 3-way stopcock; follow with prescribed doses immediately; may also give by intermittent inf over 1 hr before anesthesia

• 
Considered incompatible in sol or syringe; compatibility unknown

• 
Storage in tight container at room temp; protect diluted sol from light, use reconstituted sol within 6 hr

SIDE EFFECTS

CNS:
Dizziness, weakness, fatigue, drowsiness
, headache, disorientation, insomnia, paresthesias, tremors,
seizures

CV:
Hypotension, chest pain, palpitations

EENT:
Nasal congestion, blurred vision, mydriasis

GI:
Hepatic injury,
nausea
, constipation, vomiting, increased AST, alk phos, abdominal pain, dry mouth, anorexia, hepatitis, dyspepsia

GU:
Urinary frequency, nocturia, impotence, crystalluria,
hepatitis

HEMA:
Eosinophilia, aplastic anemia, leukopenia, thrombocytopenia/lymphoma

INTEG:
Rash, pruritus, photosensitivity, extravasation (tissue necrosis)

RESP:
Pleural effusion,
pulmonary edema

PHARMACOKINETICS

PO:
Peak 5 hr, highly protein bound, half-life 8 hr, metabolized in liver, excreted in urine (metabolites), absorption poor (35%)

INTERACTIONS

Increase:
dysrhythmias—verapamil

Increase:
hepatotoxicity—estrogens, other hepatotoxics

Increase:
CNS depression—alcohol, tricyclics, opiates, barbiturates, sedatives, hypnotics, antihistamines

NURSING CONSIDERATIONS
Assess:


 
Seizures:
increased seizure activity, ECG in epilepsy patient; poor seizure control has occurred

• 
I&O ratio; check for urinary retention, frequency, hesitancy, especially geriatric patients

 

Black Box Warning:

Active hepatic disease:
hepatic function by frequent determination of AST, ALT, bilirubin, alk phos, GGTP; renal function studies, BUN, creatinine, CBC


 
Allergic reactions:
rash, fever, respiratory distress


 
Severe weakness, numbness in extremities; prescriber should be notified and product discontinued

• 
Tolerance: increased need/more frequent requests for medication, increased pain

• 
CNS depression: dizziness, drowsiness, insomnia, psychiatric symptoms

 
Signs of hepatotoxicity:
jaundice, yellow sclera, pain in abdomen, nausea, fever; prescriber should be notified, product discontinued

Evaluate:

• 
Therapeutic response: decreased pain, spasticity

Teach patient/family:


 
Not to discontinue medication quickly because hallucinations, spasticity, tachycardia will occur; product should be tapered off over 1-2 wk; to notify prescriber of abdominal pain, jaundiced sclera, clay-colored stools, change in color of urine

• 
That if improvement does not occur within 6 wk, prescriber may discontinue product

• 
To avoid hazardous activities if drowsiness, dizziness occurs

• 
To avoid using OTC medications: cough preparations, antihistamines, other CNS depressants, alcohol unless directed by prescriber

• 
To use sunscreen or stay out of the sun to prevent burns

TREATMENT OF OVERDOSE:

Activated charcoal, supportive care

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

dapiprazole ophthalmic

See
Appendix B

 

DAPTOmycin (Rx)

(dap′toe-mye-sin)

Cubicin

Func. class.:
Antiinfective—miscellaneous

Chem. class.:
Lipopeptides

ACTION:

A new class of antiinfective; it binds to the bacterial membrane and results in a rapid depolarization of the membrane potential, thereby leading to inhibition of DNA, RNA, and protein synthesis

USES:

Complicated skin, skin-structure infections caused by
Staphylococcus aureus
including methicillin-resistant strains,
Streptococcus pyogenes, Streptococcus agalactiae, Streptococcus dysgalactiae, Enterococcus faecalis
(vancomycin-susceptible strains)

Unlabeled uses:
Bacteremia, endocarditis, UTI, vancomycin-resistant enterococci (VRE),
Corynebacterium jeikeium, Staphylococcus haemolyticus, Enterococcus facium

CONTRAINDICATIONS:

Hypersensitivity

Precautions:
Pregnancy (B), breastfeeding, children, geriatric patients, GI/renal disease, myopathy, ulcerative/pseudomembranous colitis, rhabdomyolysis, eosinophilic pneumonia

DOSAGE AND ROUTES
Calculator


Adult: IV INF
4 mg/kg over 1/2 hr diluted in 0.9% NaCl, give q24hr × 7-14 days; some indications may use up to 6 mg/kg


Adolescent/child/infant ≥5 mo (unlabeled): IV
4-6 mg/kg/day

Renal dose


 
Adult: IV INF
CCr <30 ml/min, hemodialysis, CAPD 4 mg/kg q48hr

Bacteremia, endocarditis, UTI (unlabeled)


Adult: IV
6 mg/kg/day

VRE (unlabeled)


Adult: IV
4 mg/kg/day

Available forms:
Lyophilized powder for inj 500 mg

Administer:
IV route

• 
After reconstitution with 5 ml 0.9% NaCl (250 mg/5 ml) or 10 ml 0.9% NaCl (500 mg/10 ml); further dilution is needed with 0.9 NaCl; infuse over 1/2 hr or give reconstituted sol (50 mg/ml) by IV inj over 2 min, do not use dextrose-containing solutions

Y-site compatibilities:
Alfentanil, amifostine, amikacin, aminocaproic acid, aminophylline, amiodarone, amphotericin B liposome, ampicillin, ampicillin-sulbactam, argatroban, arsenic trioxide, atenolol, atracurium, azithromycin, aztreonam, bivalirudin, bleomycin, bumetanide, buprenorphine, busulfan, butorphanol, calcium chloride/gluconate, CARBOplatin, carmustine, caspofungin, ceFAZolin, cefepime, cefotaxime, cefoTEtan, cefOXitin, cefTAZidime, ceftizoxime, cefTRIAXone, cefuroxime, chloramphenicol, chlorproMAZINE, cimetidine, ciprofloxacin, cisatracurium, CISplatin, clindamycin, cyclophosphamide, cycloSPORINE, dacarbazine, DACTINomycin, DAUNOrubicin, dexamethasone, dexmedetomidine, dexrazoxane, diazepam, digoxin, diltiazem, diphenhydrAMINE, DOBUTamine, DOCEtaxel, dolasetron, DOPamine, doripenem, doxacurium, DOXOrubicin, DOXOrubicin liposomal, doxycycline, droperidol, enalaprilat, ePHEDrine, EPI
NEPHrine, epirubicin, eptifibatide, ertapenem, erythromycin, esmolol, etoposide, famotidine, fenoldopam, fentaNYL, fluconazole, fludarabine, fluorouracil, foscarnet, fosphenytoin, furosemide, ganciclovir, gentamicin, glycopyrrolate, granisetron, haloperidol, heparin, hydrALAZINE, hydrocortisone, HYDROmorphone, hydrOXYzine, IDArubicin, ifosfamide, inamrinone, insulin (regular), irinotecan, isoproterenol, ketorolac, labetalol, leucovorin, levofloxacin, lidocaine, linezolid, LORazepam, magnesium sulfate, mannitol, mechlorethamine, melphalan, meperidine, meropenem, mesna, metaraminol, methyldopate, methylPREDNISolone, metoclopramide, metoprolol, midazolam, milrinone, mitoXANtrone, mivacurium, morphine, moxifloxacin, mycophenolate mofetil, nafcillin, nalbuphine, naloxone, niCARdipine, nitroprusside, norepinephrine, octreotide, ondansetron, oxaliplatin, oxytocin, PACLitaxel, palonosetron, pamidronate, pancuronium, PEMEtrexed, pentamidine, PHENobarbital, phenylephrine, piperacillin-tazobactam, polymyxin B, potassium acetate/chloride/phosphates, procainamide, prochlorperazine, promethazine, propranolol, quinupristin-dalfopristin, ranitidine, rocuronium, sodium acetate/bicarbonate/citrate/phosphates, succinylcholine, sulfamethoxazole-trimethoprim, tacrolimus, teniposide, theophylline, thiotepa, ticarcillin, ticarcillin-clavulanate, tigecycline, tirofiban, tobramycin, topotecan, trimethobenzamide, vasopressin, vecuronium, verapamil, vinBLAStine, vinCRIStine, vinorelbine, voriconazole, zidovudine, zoledronic acid

Solution compatibilities:
0.9% NaCl, LR

SIDE EFFECTS

CNS:
Headache, insomnia, dizziness, confusion, anxiety, fatigue, fever

CV:
Hypo/hypertension,
heart failure,
chest pain

GI:
Nausea, constipation, diarrhea, vomiting, dyspepsia,
pseudomembranous colitis,
abdominal pain

GU:
Nephrotoxicity

HEMA:
Leukocytosis, anemia, thrombocytopenia

INTEG:
Rash, pruritus

MISC:
Fungal infections, UTI, anemia, hypoglycemia

MS:
Muscle pain or weakness, arthralgia, pain, myopathy

RESP:
Cough,
eosinophilic pneumonia

SYST:
Anaphylaxis

PHARMACOKINETICS

Site of metabolism unknown, protein binding 92%, terminal half-life 8-9 hr, 78% excreted unchanged (urine), breast milk

INTERACTIONS

Increase:
myopathy—HMG-CoA reductase inhibitors

Drug/Lab Test

Increase:
CPK, AST, ALT, BUN, creatinine, albumin

Increase/Decrease:
glucose

NURSING CONSIDERATIONS
Assess:

• 
Eosinophilic pneumonia:
dyspnea, fever, cough, shortness of breath; if left untreated, can lead to respiratory failure and death

 
Nephrotoxicity:
any patient with compromised renal system, toxicity may occur; BUN, creatinine

• 
I&O ratio: report hematuria, oliguria, nephrotoxicity may occur

• 
Blood studies: CBC, CPK

• 
C&S; product may be given as soon as culture taken

• 
B/P during administration; hypo/hypertension may occur

• 
Signs of infection

• 
Allergies before treatment, reaction of each medication

Evaluate:

• 
Myopathy:
assess for muscle pain, weakness; CPK >10× ULN; symptoms resolve after 3 days and CPK return to normal within 7-10 days after stopping product


 
Pseudomembranous colitis:
assess for diarrhea with mucous, pus, product should be discontinued; if moderate to severe, provide fluids, electrolytes, protein supplements, and an antibacterial

• 
Therapeutic response: negative culture

Teach patient/family:

• 
About allergies before treatment, reaction to each medication


 
To report sore throat, fever, fatigue; could indicate superinfection; diarrhea; muscle weakness, pain

• 
Avoid breastfeeding

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