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A Pilot Open-label, Randomized, Crossover, Comparative Bioavailability Study of Levodopa Administered Via Levodopa Cyclops® (Test Product) Relative to INBRIJA® (Reference Product) in Healthy Adult Subjects
Sponsor study identifier
Secondary identifiers
NIH
interventional
26
1 country
1
Study Start
September 25, 2023
Actual (reported)Primary Completion
October 20, 2023
Actual (reported)Study Completion
October 27, 2023
Actual (reported)Patients with Parkinson's disease (PD) are commonly treated with a combination of levodopa and a decarboxylase inhibitor (DCI). However, many PD patients experience motor fluctuations (OFF episodes), even with their regular levodopa/DCI treatment. This unmet medical need was addressed by the approval of INBRIJA®, an orally inhaled product, for producing therapeutic relief during the OFF episodes. INBRIJA® is a capsule-based inhaler system and in order to administer the full dose of levodopa, the patients need to inhale the contents of two capsules. In order to administer the full dose of levodopa, patients need to inhale the contents of two capsules. Since the INBRIJA® device is a standalone and reusable unit, the patients have to load the capsule prior to inhalation several times a day during the OFF episodes (except early-morning OFF) to get relief. Also, the INBRIJA® device is repeatedly used by PD patients and therefore needs to be properly cleaned to avoid contamination. PureIMS is developing a more user-friendly alternative called Levodopa Cyclops®, a pre-filled drug-device combination of levodopa inhalation powder for use with the Cyclops® dry powder inhaler. Due to the nature of the Cyclops®, it offers PD patients greater ease and convenience in use. Moreover, the device's moderate to high resistance to airflow and minimal use of excipients suggests minimal cough episodes during oral inhalation. The current study is planned in order to determine the dose at which comparative bioavailability of Levodopa Cyclops® will be reached compared to INBRIJA®.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
October 27, 2023
Actual (reported)Click on a node to explore related trials.
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Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
August 24, 2023
Actual (reported)September 14, 2023
Actual (reported)September 25, 2023
Actual (reported)October 20, 2023
Actual (reported)October 27, 2023
Actual (reported)The dose at which comparative bioavailability of levodopa will be reached between Levodopa Cyclops® versus Inbrija®
The primary objective of the present trial is to determine the dose at which comparative bioavailability of levodopa will be reached between Levodopa Cyclops® versus Inbrija® in healthy adult subjects after an oral inhalation of a single dose of 45, 90 and 135 mg levodopa under fasting conditions administered with 50 mg carbidopa one hour prior IMP administration in 3 study periods and after a single dose of 66 mg levodopa delivered dose (2 hard capsules containing 42 mg levodopa each) of Inbrija® administered with carbidopa 50 mg one hour prior to IMP administration in a fourth study period.
5 days
The time to reach a levodopa plasma concentration above 400 ng/mL as a measure for the onset of action.
5 days
1 pre-filled single-use Levodopa Cyclops® (= 45 mg levodopa)
2 pre-filled single-use Levodopa Cyclops® devices (= 90 mg levodopa)
3 pre-filled single-use Levodopa Cyclops® devices (= 135 mg levodopa)
Orally inhaled dry powder levodopa from the Cyclops® dry powder inhaler
Orally inhaled dry powder levodopa from the ARCUS® dry powder inhaler
Bed space for short term stay at Diagnostic & Consultative Centre 'Ascendent' Ltd.
Sofia, 1202, Bulgaria
Ivo Bogdanov, MD
Bed space for short term stay at Diagnostic & Consultative Centre 'Ascendent' Ltd.
26 participants (actual enrollment reported by the registry).
First Submitted
August 24, 2023
First Posted
September 14, 2023
Study Start
September 25, 2023
Actual (reported)The time above a levodopa plasma concentration 400 ng/mL as a measure for the duration of effect.
5 days
Safety and tolerability of Levodopa Cyclops® by measuring vital signs, laboratory examination and adverse events questioning
5 days
2 Inbrija® capsules (42 mg levodopa per capsule) from the Arcus® dry powder inhaler
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
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Primary Completion
October 20, 2023
Actual (reported)Study Completion
October 27, 2023
Actual (reported)Last Updated
May 31, 2025
Record last verified: 2023-10
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Source: ClinicalTrials.gov.
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