Mosby's 2014 Nursing Drug Reference (365 page)

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

scopolamine
ophthalmic

 

selegiline (Rx)

(se-le′ji-leen)

Eldepryl, Emsam, Zelapar

Func. class.:
Antiparkinson agent

Chem. class.:
MAOI, type B

Do not confuse:
Eldepryl
/enalapril

ACTION:

Increased dopaminergic activity by inhibition of MAO type B activity; not fully understood

USES:

Adjunct management of Parkinson’s disease for patients being treated with levodopa/carbidopa who had poor response to therapy; depression (transdermal)

Unlabeled uses:
Alzheimer’s disease, depression

CONTRAINDICATIONS:

Children/adolescents (suicide/hypertensive crisis), hypersensitivity, breastfeeding

Precautions:
Pregnancy (C)

DOSAGE AND ROUTES
Calculator

• Adult:
PO
10 mg/day given with levodopa/carbidopa in divided doses, 5 mg at breakfast and lunch; after 2-3 days, begin to reduce dose of levodopa/carbidopa 10%-30%;
ORAL DISINTEGRATING
1.25 mg (1 tab) × 6 wk or more initially then 2.5 mg (2 tabs) dissolved on tongue daily before breakfast; max 2.5 mg/day;
TRANSDERMAL
6 mg/24 hr initially, increase by 3 mg/24 hr at ≥2 wk, up to 12 mg/24 hr if needed

Alzheimer’s disease (unlabeled)

• Adult:
PO
5 mg bid
AM, PM

Available forms:
Tabs 5 mg; caps 5 mg; oral disintegrating tabs 1.25 mg; transdermal 6 mg/24 hr (20 mg/20 cm
2
), 9 mg/24 hr (30 mg/30 cm
2
), 12 mg/24 hr (40 mg/40 cm
2
)

Administer:
PO route

 
Do not use in children due to risk for hypertensive crisis

• 
Product until NPO before surgery

• 
Adjust dosage to response

• 
With meals; limit protein taken with product

• 
Dosing bid in
AM
and afternoon; avoid
PM
or bedtime dosing

• 
At doses of <10 mg/day because of risks associated with nonselective inhibition of MAO

• 
Oral disintegrating tab:
peel back foil; remove tab, do not push through foil; place tab on tongue, allow to dissolve, swallow with saliva

Transdermal route

• 
Apply to dry, intact skin on upper torso, upper thigh, or outer surface of upper arm q12hr

SIDE EFFECTS

CNS:
Increased tremors, chorea, restlessness, blepharospasm, increased bradykinesia, grimacing, tardive dyskinesia, dystonic symptoms, involuntary movements, increased apraxia, hallucinations,
dizziness
, mood changes, nightmares, delusions, lethargy, apathy, overstimulation, sleep disturbances, headache, migraine, numbness, muscle cramps, confusion, anxiety, tiredness, vertigo, personality change, back/leg pain,
suicide in child/adolescent, suicidal ideation in adults

CV:
Orthostatic hypotension, hypo/hypertension, dysrhythmia, palpitations, angina pectoris,
tachycardia,
edema,
sinus bradycardia,
syncope,
hypertensive crisis (children)

EENT:
Diplopia, dry mouth, blurred vision, tinnitus

GI:
Nausea, vomiting, constipation, weight loss, anorexia, diarrhea, heartburn, rectal bleeding, poor appetite, dysphagia, xerostomia

GU:
Slow urination, nocturia, prostatic hypertrophy, urinary hesitation, retention, frequency, sexual dysfunction

INTEG:
Increased sweating, alopecia, hematoma, rash, photosensitivity, facial hair

RESP:
Asthma, SOB

PHARMACOKINETICS

Absorption (tab) 40-90 min, (oral disintegrating tab) 10-15 min; peak 1/2-2 hr; rapidly metabolized (active metabolites:
N
-desmethyldeprenyl, amphetamine, methamphetamine); metabolites excreted in urine; half-life 10 hr, orally disintegrating tab 1.3 hr; protein binding up to 85%

INTERACTIONS

 
Fatal interaction: opioids (especially meperidine); do not administer together

 
Serotonin syndrome (confusion, seizures, fever, hypertension, agitation); death—FLUoxetine, PARoxetine, sertraline, fluvoxaMINE (discontinue 5 wk before selegiline treatment); do not use together

 
Fatal interaction: do not use with tricyclics

Increase:
side effects of levodopa/carbidopa

Increase:
unusual behavior, psychosis —dextromethorphan

Increase:
hypotension—antihypertensives

Drug/Lab Test

Decrease:
VMA

False positive:
urine ketones, urine glucose

False negative:
urine glucose (glucose oxidase)

False increase:
uric acid, urine protein

NURSING CONSIDERATIONS
Assess:

• 
Parkinson’s symptoms:
decreased rigidity, unsteady gait, weakness, tremors

• 
Cardiac status: tachycardia/bradycardia; B/P, respiration throughout treatment

• 
Mental status: affect, mood, behavioral changes, depression; perform suicide assessment on all patients,
suicidal ideation may occur

 
Opioids; if patient has received, do not administer selegiline, fatal reactions have occurred

Perform/provide:

• 
Assistance with ambulation during beginning therapy

Evaluate:

• 
Therapeutic response: decrease in akathisia, improved mood

Teach patient/family:

• 
To change positions slowly to prevent orthostatic hypotension

• 
Hypertensive crisis:
nausea, vomiting, sweating, agitation, change in mental status, headache, chest pain; to notify prescriber immediately

• 
Serotonin syndrome:
to report twitching, sweating, shivering, diarrhea to prescriber immediately

• 
To use product exactly as prescribed; if discontinued abruptly, parkinsonian crisis may occur

• 
Pregnancy:
to report if pregnancy is planned or suspected, pregnancy (C), avoid breastfeeding

• 
To use during the day to prevent insomnia

• 
To avoid heating pads, hot tubs when using transdermal products

• 
To avoid hazardous activities until response is known

• 
To avoid foods high in tyramine: cheese, pickled products, wine, beer, large amounts of caffeine

 
Not to exceed recommended dose of 10 mg (PO) because this might precipitate hypertensive crisis; to report severe headache, other unusual symptoms

TREATMENT OF OVERDOSE:

IV fluids for hypertension, IV dilute pressure agent for B/P titration

Other books

William by Sam Crescent
Immortality Is the Suck by Riley, A. M.
Twenties Girl by Sophie Kinsella
Shadows by Armentrout, Jennifer L.
The Hunters by Tom Young
Taking Off by Eric Kraft
Her Story by Casinelli, Christina
Mirage by Tracy Clark