Pharm
Mirapex
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Mirapex
, Pramipexole
See Also
Dopamine Agonist
Ropinirole
(
Requip
)
Parkinsonism
Restless Leg Syndrome
Indications
Parkinson's Disease
Restless Leg Syndrome
Symptoms for at least 2 days/week for 3 months
Mechanism
Non-ergot selective
Dopamine
receptor
Agonist
Pharmacokinetics
Half life: 7-17 hours
Minimal metabolism
Adverse Effects
Unknown safety in pregnancy and
Lactation
Nausea
(common)
Drowsiness (Limited to higher dosages)
May be sudden, severe without warning
May occur up to one year after starting Mirapex
Has resulted in falling asleep while driving
Augmentation of Restless Leg Symptoms
Occurs in 25% of RLS patients on longterm therapy
May progress in severity, and involve arms, trunk
Often better if dose timing changed to earlier in day
May be worse if dose increased
Other uncommon adverse effects (rare at low dose)
Hallucination
s
Pathologic Gambling
(related to
Dopamine
receptor
Agonist
activity, D3)
Orthostatic Hypotension
Hypersexuality
Dosing
Parkinsonism
Immediate Release
Start 0.125 mg three times daily for one week
Next 0.25 mg three times daily
May increase by 0.25 mg/dose each week as needed up to 4.5 mg/day
Target 1.5 to 4.5 mg/day
Renal adjustments
GFR 30 to 50 ml/min: Start 0.125 mg orally twice daily (maximum 0.75 mg three times daily)
GFR 15 to 30 ml/min: Start 0.125 mg orally daily (may increase 0.125 mg/dose/week, max: 1.5 mg daily)
Extended Release
Start 0.375 mg daily
After 5 to 7 days, may increase by 0.75 mg/dose each week up to 4.5 mg/day
Renal adjustments
GFR 30 to 50 ml/min: May increase dose 0.375 mg/dose/week (max: 2.25 mg/day)
Avoid extended release when GFR <30 ml/min
Discontinuation (immediate or extended release)
Reduce daily total dose by 0.75 mg/day until dose 0.75 mg/day
Next reduce total dose by 0.35 mg/day
Dosing
Restless Leg Syndrome
Start: Mirapex 0.125 mg orally taken 2-3 hours before bedtime
Interval for increasing dose if ineffective is based on
Renal Function
GFR >60 ml/min: Increase dose every 3-7 days
GFR 20-60 ml/min: Increase dose every 14 days
Titrating dose: Increase at set interval as above by one tablet if ineffective at current dose
Start at 0.125 mg one tablet nightly for set interval in days
Increase to two tablets (0.25 mg) nightly for set interval if ineffective at 0.125 mg
Increase to three tablets (0.375 mg) nightly for set interval if ineffective at 0.25 mg
Maximum dose: 6 tablets (0.75 mg) taken at bedtime
Stopping: No titration needed
Efficacy
At least 50% reduction in symptoms in 60% of patients
Placebo
had similar reduction in 42%
Number Needed to Treat
: 6
Symptoms recur when Mirapex is stopped
Resources
Pramipexole (DailyMed)
https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=395fee34-43dc-4840-a6b8-70d5736f9c8b
References
(2021) Med Lett Drugs Ther 63(1618): 25-32
Olson (2020) Clinical
Pharmacology
, Medmaster Miami, p. 46-7
Hamilton (2020) Tarascon Pocket Pharmacopoeia
Jarvis (2007) Am Fam Physician 75:1239-40 [PubMed]
Montplasir (2006) Eur J Neurol 13:1306-11 [PubMed]
Silber (2003) Sleep 26:819-21 [PubMed]
Winkelman (2006) Neurology 67:1034-9 [PubMed]
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