".......I was always under the impression I would receive drug...

".......I was always under the impression I would receive drug if given placebo but this is not the case "
I have not looked up the contract for participation in the trials, but I have to ask you this. The trials are still going on, are they not? Getting the real drug AFTER the trials are over is different than expecting the real thing after YOUR trial participation is finished. I cannot see the company offering those participants another dose of Zilosul while the original BLIND trial is still going on. It would defeat the purpose of the blind trial, by (1), showing that it did not help you while still not knowing which shot you got, and (2), will affect any further questions they have for participants as to whether there were any further changes in your condition, as the trial is not finished yet.

Just a suggestion, and good luck with your future endeavors.