42
Participants
Start Date
January 31, 2012
Primary Completion Date
December 31, 2016
Study Completion Date
December 31, 2016
N-acetylcysteine
NAC 600mg capsule or matching Placebo , 1 twice daily for 90 days, then increase to NAC 1,200mg or matching placebo, 2 capsules twice daily for 270 days.
Placebo
sugar pill manufactured to minic NAC 600mg capsule
The University of Texas Health Science Center at Houston, Houston
National Institutes of Health (NIH)
NIH
The University of Texas Health Science Center, Houston
OTHER