Intermittent Oral Administration vs. Semi-continuous Intra-oral Administration of Levodopa/Carbidopa in Fluctuating Parkinsonian Patients

Parkinson Disease Clinical Trial

— LDCD-001  

Official title:

A Phase IIa Study to Assess the Safety, Tolerability, Plasma Pharmacokinetics and Efficacy of Intermittent Oral Administration of Standard Levodopa/Carbidopa vs. Semi-continuous Intra-oral Administration of Levodopa/Carbidopa in Patients With Advanced Parkinson's Disease Who Suffer Motor Fluctuations

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02763137
• Other study ID #: RP 12/14
• Status: Completed
• Phase: Phase 2
• Start date: July 30, 2014
• Est. completion date: October 2015

Study information

• Verified date: October 2022
• Source: IRCCS San Raffaele Roma
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This is a phase IIa study to assess the safety, tolerability, plasma pharmacokinetics and efficacy of intermittent oral administration of standard levodopa/carbidopa (LD/CD) vs.semi-continuous intra-oral administration of levodopa/carbidopa in patients with advanced Parkinson's disease (PD) who suffer motor fluctuations.The objective of this study is to assess the plasma pharmacokinetics (PK) of continuous intra-oral administration of LD/CD vs. intermittent administration of standard oral LD/CD. For purposes of this study continuous intra-oral administration of LD/CD is defined as oral administration of LD/CD at 5-10 minute intervals.

Secondary objectives are to assess the safety and tolerability of continuous intra-oral administration of LD/CD and the effect on PD motor function of continuous intra-oral administration of LD/CD vs. intermittent administration of standard oral LD/CD.

Description:

18 PD subjects with motor fluctuations on stable doses of standard levodopa/carbidopa +/- other dopaminergic therapy who meet entry criteria and sign an Institutional Ethical Committee approved informed consent will participate in this study. The study will be conducted at the San Raffaele IRCCS in Rome, Italy.

Subjects who successfully complete the screening activities to confirm eligibility and are approved by an enrollment steering committee will be admitted to hospital on the evening of day 1 to undergo baseline evaluations. Standard oral levodopa/carbidopa (LD/CD) medication will be stopped at midnight. On day 2, a standardized low protein breakfast will be provided and treatment will be initiated with their usual dose of standard oral LD/CD. All subsequent doses will be administered at their pre-baseline dosing intervals; other anti-parkinson medications will not be stopped and will be maintained at their usual dose. If rescue therapy is required, treatment with apomorphine sc will be administered as a first preference. Plasma levels of levodopa and metabolites will be measured over the course of the ensuing 8 hours. Physicians will assess motor status (off, on without dyskinesia, or on with dyskinesia) at 30-minute intervals throughout the 8-hour observation period and perform UPDRS motor exams at 0, 2, 4, and 8 hours. Patients will then resume their standard oral LD/CD anti-parkinsonian medications (if any), which will be stopped at midnight. On day 3 subjects will receive continuous intra-oral administration of standard LD/CD at a dose equal to the total dose of standard oral LD/CD that they would normally consume over the time course of the study period. For the purposes of this study continuous intra-oral administration will refer to oral dosing at 5-10 minute intervals. To achieve this, the drug will be chopped and administered with water so that the same total dose of levodopa that would normally be taken intermittently will be divided up and administered as small doses at 5-10 minute intervals. Patients will undergo all of the same PK blood sampling as on Day 2. If the patient is taking Stalevo, a dose of entacapone will be administered at the usual time intervals that Stalevo otherwise would have been taken. Patients will then resume their standard oral LD/CD anti-parkinsonian medication (if any), which will be stopped at midnight. On Day 4 of the study subjects will receive their first LD/CD dose orally, and the balance of the total dose they would normally take over the next 8 hours by way of continuous intra-oral administration of LD/CD over the course of the 8 hour study period. If taking Stalevo, entacapone will be administered by itself at the time Stalevo would normally have been taken.

Physicians will assess motor status (off, on without dyskinesia, or on with dyskinesia) at 30-minute intervals throughout the continuous intra-oral administration and perform UPDRS motor exams at 0, 2, 4, and 8 hours. At the completion of the study, patients will be discharged from the clinic on their standard medication. Patients will return on day 18 for a safety evaluation.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 18
• Est. completion date: October 2015
• Est. primary completion date: October 2015
• Accepts healthy volunteers: No
• Gender: All
• Age group: 35 Years to 75 Years

Eligibility

Inclusion criteria

1. PD diagnosis consistent with United Kingdom Brain Bank Criteria

2. Good response to levodopa with at least 2 hours of wearing off episodes in judgment of investigator

3. Stable doses of levodopa plus/minus other dopaminergic therapy (minimum of 4 weeks for each drug)

4. Mini Mental Score Examination (MMSE): score > 26

5. Capable of providing informed consent

6. No clinically significant medical, psychiatric or laboratory abnormalities in the judgment of the investigator.

7. No history of psychosis or hallucinations in the past 6 months

8. Women who are capable of child bearing must have a negative urine pregnancy test at screening visit and use an adequate contraceptive method throughout the study.

9. Approval for entry into the study by an enrolment steering committee

Exclusion criteria

1. Atypical or secondary parkinsonism

2. Severe dyskinesia that might interfere with study performance in judgment of investigator

3. Patient receiving duodopa, apomorphine infusion or Deep Brain Stimulation (DBS)

4. Dysphagia or sialorrhea that might interfere with administration of study intervention

5. Any relevant medical, surgical, or psychiatric condition, laboratory value, or concomitant medication which, in the opinion of the Investigator, would interfere with performing a pharmacokinetic study or would interfere with drug absorption.

Related Conditions & MeSH terms

• Parkinson Disease

Intervention

Drug:
• Standard LD/CD
LD/CD will be administered at patient's usual dose and frequency during 8 hours interval
• Semi continuous intra-oral administration of LD/CD
Semi continuous intra-oral administration of standard LD/CD at a dose equal to the total dose of standard oral LD/CD that patients would normally consume over 8 hours period.

Locations

Country	Name	City	State
Italy	Irccs San Raffaele Pisana	Rome

Sponsors (2)

Lead Sponsor	Collaborator
IRCCS San Raffaele Roma	SynAgile Corporation

Country where clinical trial is conducted

Italy, 

References & Publications (1)

Stocchi F, Vacca L, Ruggieri S, Olanow CW. Intermittent vs continuous levodopa administration in patients with advanced Parkinson disease: a clinical and pharmacokinetic study. Arch Neurol. 2005 Jun;62(6):905-10. doi: 10.1001/archneur.62.6.905. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Variability in the observed plasma concentration of levodopa as assessed with the fluctuation index (Fluctuation index= (Maximum Plasma Concentration (Cmax)-Minimum Plasma Concentration (Cmin))/Concentration average)	Change in fluctuation index between intermittent administration (Day 2) and intra-oral administration (Day 3)	Change in fluctuation index between Day 2 and Day 3
Secondary	Assess the safety and tolerability of continuous intra-oral administration of LD/CD: Adverse Events	Record of any adverse event	From Day 1 to Day 18
Secondary	Assess the effect on number of hours of "off" time of continuous intra-oral administration of LD/CD vs. intermittent administration of standard oral LD/CD		Change in number of hours of "off" time between Day 2 and Day 3
Secondary	Assess the effect on UPDRS of continuous intra-oral administration of LD/CD vs. intermittent administration of standard oral LD/CD		Change in UPDRS between Day 2 and Day 3