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Parkinsons
Overview
69
Art History
2nd Grade
03/31/2014

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Term
Essential tremor treatments
Definition
Propranolol: Crosses BBB; Primidone: anticonvulsant
Term
ranks among the most common late life neurodegenerative disease; affects slightly more men than women
Definition
Parkinson's Disease
Term
Parkinson's Cardinal Signs
Definition
Tremor; Rigidity; Akinesia; Postural Instability
Term
Secondary Parkinsons Symptoms
Definition
Short-stepped; reduced facial expressions; muffled speech (dysarthria); reduced arm swing; reduced eye blinking and frequency of swallowing; depression/anxiety; sleep disorders; constipation; orthostatic intolerance; micrographia
Term
Disruption of this production affects neurotransmission
Definition
dopamine
Term
decrease in number in parkinsons
Definition
cells in substantia nigra which produce dopamine
Term
most patients are diagnosed with this type of Parkinson's Disease
Definition
idiopathic
Term
Late stage complications include
Definition
choking, pneumonia, falls
Term
Parkinson's co-morbidities
Definition
hallucinations, depression/anxiety, Parkinson's disease with dementia, insomnia, orthostatic hypotension, constipation, excessive salivation, dermatitis, excessive perspiration, urinary incontinence
Term
Dementia in Parkinson's Disease
Definition
~30% of patients
Term
Most symptoms result from lack of dopamine
Definition
in the corpus striatum
Term
majority of anti-Parkinson's medications
Definition
temporarily replenish, mimic, or enhance dopamine
Term
Drugs that alter dopamine = dopaminergic drugs
Definition
muscle rigidity, improve speed and coordination of movement, lessen tremor
Term
Dopamine agonists
Definition
Ropinirole (Requip), Pramipexole (Mirapex)
Term
COMT Inhibitors
Definition
Entacapone (Comtan), Tolcapone (Tasmar)
Term
MAO-B Inhibitors
Definition
Selegiline (Zelapar), Rasagiline (Azilect)
Term
Anticholinergics
Definition
Trihexyphenidyl (Artane), Benztropine (Cogentin)
Term
txt: no/minimal motor impairment
Definition
watch/wait or rasagiline
Term
txt: mild
Definition
MAO-B inhibitor (Selegilin, Rasagiline)
Term
txt: moderate
Definition
Dopamine agonist, levodopa/carbidopa
Term
txt: severe
Definition
levodopa/carbidopa
Term
txt: wearing-off
Definition
L-dopa interval; COMT inhibitor, dopamine agonist, MAO-B inhibitor, apomorphine, surgery
Term
txt: Dyskinesias
Definition
Amantadine: L-dopa reduction, surgery
Term
txt: non-motor symptoms
Definition
multidisciplinary; symptomatic
Term
Possible dopamine related side effects
Definition
nausea/vomiting, somnolence/fatigue, dizziness/postural hypotension, headache, dyskinesias, constipation, impulse control disorders, confusion, vivid dreams, hallucinations
Term
Levodopa
Definition
crosses BBB, converted to dopamine, binds dopamine receptors; effect: decreased motor symptoms; action terminated by breakdown or recycling of dopamine
Term
carbidopa/levodopa (Sinemet) Symptoms that respond:
Definition
tremor, rigidity, slowed movements, gait disturbances, micrographia
Term
Nausea Medications: Dopamine blockers are a problem
Definition
metoclopramide, prochlorperazine, several others
Term
Nausea Medications: non-dopamine blockers acceptable
Definition
ondansetron/other 5HT3 antagonists, anticholinergics
Term
prevents conversion of levodopa to dopamine in periphery
Definition
Carbidopa
Term
needs 70-100 mg of carbidopa/day
Definition
to prevent nausea from dopamine
Term
Carbidopa/Levodopa (Sinemet)
Definition
initially 25/100 mg TID; CR formulations may be dose BID, taking with food may decrease N/V
Term
Sinemet: taking with protein
Definition
may decrease effectiveness and worsen "On" and "off" fluctuations
Term
Sinemet: taking with high fat meals
Definition
may delay onset
Term
Dyskinesias
Definition
most often caused by carbidopa/levodopa; excess DA may lead to involuntary movements; not common with newly diagnosed patients
Term
dyskinesias seen with:
Definition
longer duration of treatment, higher dosages, "peak dose", individual patient sensitivity
Term
Since disease progression is an issue
Definition
people who have PD longer will have greater likelihood of dyskinesias
Term
Responses: ON/OFF
Definition
fluctuating response to the drug; excessive levodopa storage; increase dosing frequency (e.g. 8 x per day)
Term
Responses: wearing off
Definition
onset of PD symptoms before next dose; increase dosing frequency
Term
Responses: delayed "on"
Definition
protein or high fat diets later in disease state may alter drug absorption
Term
Dopamine Agonists: Ergot derived
Definition
Bromocriptine (Parlodel)
Term
Dopamine Agonists: non-ergot derived
Definition
Ropinirole (Requip, Requip XL), PRamipexole (Mirapex), Rotigotine (Neupro) Patch, Apomorphine (Apokyn)
Term
Dopamine agonists
Definition
binding to dopamine receptors will not give all the same benefits and side effects as dopamine itself; generally very effective medications; less effective than carbidopa/levodopa but less risk of dyskinesia
Term
Dopamine agonists: Ropinirole and Pramipexole
Definition
almost exclusively used
Term
Rotigotine patch became available again in 2012
Definition
steady drug level potentially beneficial, side effects still similar to other dopamine agonists
Term
activate dopamine receptors; slow titration; side effects: N/V, diarrhea, hallucinations are more common in older people; lower incidence of dyskinesias
Definition
Dopamine Agonists
Term
Injectable dopamine agonist: used as needed for off episodes in advanced PD
Definition
Apomorphine (Apokyn)
Term
Apopmorphine (Apokyn) AEs
Definition
hypotension (1st dose administered at physicians office); nausea/vomiting (gien with trimethobenzamide 300 mg TID daily 3 days prior to 1st dose; do not use ondansetron (Additive hypotension)
Term
Sleep Attacks
Definition
may occur with all dopaminergic medications, educate about lack of warning with onset
Term
COMT Inhibitors
Definition
Catechol-O-Methyltranserase inhibitors
Term
COMT in periphery
Definition
converts levodopa to 3-O methyldopa; 3-o methyldopa competes with levodopa to cross BBB
Term
COMT in CNS
Definition
converts dopamine to 3 methoxytyramine
Term
COMT inhibitors
Definition
Tolcapone (Tasmar); Entacapone (Comtan); Carbidopa/levodopa/entacapone (Stalevo)
Term
Tolcapone (Tasmar)
Definition
Liver toxicity
Term
Entacapone (Comtan) 200 mg/dose (amx 8 doses)
Definition
must take levodopa, reduces "off time", useful for "wearing off"; SE: stain bodily fluids orange, diarrhea
Term
MAO-B inhibitors
Definition
Selegiline (Zelapar ODT, Eldepryl); Rasagiline (Azilect)
Term
Monoamine Oxidase in CNS
Definition
Dopamine is converted to 3,4 dihydroxy-phenylacetic acid
Term
Selegiline
Definition
loses selectivity at doses 4-8 x therapeutic dose; dosed at breakfast and lunch
Term
Rasagiline
Definition
Loss of selectivity occurs at 2-4 mg/day
Term
MAO-B Inhibitors SEs
Definition
insomnia, anxiety
Term
Amantadine (Symmetrel)
Definition
Antiviral: tremor, rigidity, bradykinesia (slowed movements), levodopa induced dyskinesias
Term
Amantadine Side Effects
Definition
Livedo reticularis (remodeling of skin, purple spots); edema; dry mouth
Term
Anticholinergics
Definition
second line therapy used since 1940s; Tremor (Trihexyphenidyl, benztropine, diphenhydramine, procyclidine, biperiden HCl)
Term
Anticholinergic SEs
Definition
blurred vision, dry mouth, urinary retention, constipation, confusion, sedation, hallucinations
Term
alpha 1 agonist (help raise blood pressure)
Definition
Midodrine
Term
mineralcorticoid (help raise blood pressure)
Definition
Fludrocortisone
Term
Deep brain stimulation
Definition
may have substantial benefit for some patients: essential tremor or dystonia, Parkinson's disease
Term
Deep brain stimulation: who to refer w/ parkinsons
Definition
L-dopa responsive, no atypical parkinsons disease, no dementia, access to follow up care, ambulatory, younger is better, generally healthy
Term
Carbidopa/levodopa ER capsule Rytary
Definition
pending FDA approval; differ from sinemet ER- longer duration of action
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