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Trial + Data / Events	Status	Ph	N	Region	Interventions	Sponsor	Conditions	Primary compl	Study compl
levodopa/carbidopa CR / Generic mfg.
NCT03111485: Effect of Long-acting Levodopa on Obstructive Sleep Apnea in Parkinson's Disease	Completed	4	36	Canada	Sinemet CR, Long acting levodopa, Placebo oral capsule, Placebo	McGill University Health Centre/Research Institute of the McGill University Health Centre, Weston Brain Institute	Parkinson's Disease, Obstructive Sleep Apnea	10/22	10/22
TESDR, NCT05132660: Treating Early Stage Diabetic Retinopathy	Enrolling by invitation	1	244	US	Sinemet CR, Levodopa, placebo	VA Office of Research and Development, Emory University	Diabetic Retinopathy	12/27	12/28