Included in The Cochrane Library is The Cochrane Central Register of Controlled Trials. This database contains citations and abstracts for controlled trials.
After running your search, click on the "TRIALS" button in the left sidebar. This will display any controlled trials retrieved from the database.
If you identify any articles you would like to retrieve, you will probably need to record the journal information and look for the issue (if we have a subscription) through the NIC Library's Journal Search or check in Google Scholar @ NIC to see if we have access.