Long-term safety and maintenance of efficacy of levodopa-carbidopa intestinal gel: an open-label extension of the double-blind pivotal study in advanced Parkinson's disease patients

Levodopa-carbidopa intestinal gel (LCIG) is delivered continuously via intrajejunal percutaneous gastrostomy tube. To examine long-term safety, efficacy and quality of life of LCIG in an open-label extension study. Patients received 52 weeks of open-label LCIG treatment following a 12-week double-bl...

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Bibliographic Details
Published in:Journal of Parkinson's disease Vol. 5; no. 1; p. 165
Main Authors: Slevin, John T, Fernandez, Hubert H, Zadikoff, Cindy, Hall, Coleen, Eaton, Susan, Dubow, Jordan, Chatamra, Krai, Benesh, Janet
Format: Journal Article
Language:English
Published: Netherlands 01.01.2015
Subjects:
Age Factors
Aged
Antiparkinson Agents - therapeutic use
Carbidopa - therapeutic use
Double-Blind Method
Drug Delivery Systems
Female
Gels - therapeutic use
Humans
Levodopa - therapeutic use
Longitudinal Studies
Male
Middle Aged
Parkinson Disease - drug therapy
Severity of Illness Index
clinical trial
levodopa-carbidopa intestinal gel
Parkinson's disease
percutaneous endoscopic gastrostomy
motor fluctuations
ISSN:1877-718X, 1877-718X
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Summary:Levodopa-carbidopa intestinal gel (LCIG) is delivered continuously via intrajejunal percutaneous gastrostomy tube. To examine long-term safety, efficacy and quality of life of LCIG in an open-label extension study. Patients received 52 weeks of open-label LCIG treatment following a 12-week double-blind, double-dummy trial in which they were randomized to either LCIG or immediate-release oral levodopa-carbidopa. Patient cohort designation was by receipt of LCIG in the preceding trial randomization (continuing-LCIG vs. LCIG-naïve patients). Sixty-two of 66 subjects in the double-blind proceeded to the open-label extension. Most subjects (95%) reported ≥1 adverse event (AE); only 3 subjects (4.8%) discontinued due to AEs. AE incidence declined gradually over 52 weeks. Serious AEs were reported by 23%. LCIG-naïve patients (N = 29) showed a decrease in "Off" time and an increase in "On" time without troublesome dyskinesia (change from baseline to final visit in mean [SD] hours = -2.34 [2.78] P < 0.001 and 2.19 [3.70] P = 0.005, respectively), while continuing-LCIG patients (N = 33) showed sustained "Off" time duration and further improvement in "On" time without troublesome dyskinesia (-0.42 [2.67] P = 0.377 and 1.00 [2.58] P = 0.036, respectively). The majority of patients in both groups (LCIG-naïve, continuing-LCIG, respectively) were rated 'Much Improved' or 'Very Much Improved' at final visit on the Clinical Global Impression-Improvement scale (69.0%, 69.7%). Continuing-LCIG patients continued to derive benefit from LCIG while the magnitude of improvement among LCIG-naïve patients was similar to that observed for patients on LCIG in the preceding double-blind study. The overall AE profile was consistent with previous phase 3 clinical trials involving the LCIG system.
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ISSN:1877-718X
1877-718X
DOI:10.3233/JPD-140456