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Antonini, A. et al.

Angelo Antonini, Daniela Calandrella,

Pharmacokinetic evaluation of pramipexole.

Introduction: Immediate-release (IR) pramipexole dihydrochloride is indicated for the treatment of signs and symptoms of idiopathic Parkinson's disease (PD). It is administered alone (without levodopa) or in combination with levodopa, during the entire progress of the disease, up to an advanced stage. Currently, it is also indicated for the treatment of moderate-to-severe primary restless legs syndrome (RLS). An extended-release (ER) formulation of pramipexole has been developed to allow a once-daily administration and to provide more stable dopaminergic stimulation in PD patients. Areas covered: This review summarizes the overall pharmacokinetic profile of pramipexole for both the IR and ER formulations. Also discussed are the clinically relevant determinants of pramipexole peripheral pharmacokinetics and the potential role of genetic and clinical determinants in drug efficacy. Expert opinion: Pramipexole is a non-ergot agonist with selective affinity for dopamine receptors of the D2 subfamily, in particular D3. Pramipexole has a very low affinity for serotoninergic 5-HT2A and 5-HT2B receptors, as well as D1-type receptors. Furthermore, it does not carry the risk to induce valvular heart disease or pulmonary and retroperitoneal fibrosis, seen with long-term use of the ergot-derived dopamine agonists. The recent introduction of a once-daily formulation poses significant advantages for patients, reflected by relatively stable plasma levels. The most obvious benefit is convenience of use and better adherence to treatment schedule. Additional advantages could include the opportunity to provide more continuous drug delivery in a fashion that could help minimize dyskinesia risk, if the drug is used early in the disease course.[1]

References

Pharmacokinetic evaluation of pramipexole. Antonini, A., Calandrella, D. Expert. Opin. Drug. Metab. Toxicol (2011) [Pubmed]

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