Strange Research Study at UNC

I just received the following study invitation from UNC. For such an invasive study, it seems that there is very little information given.

Are You a Healthy Male Age 18 to 49?
Interested in Participating in a Clinical Research Study???
Investigators at UNC are looking for healthy men to participate in a
drug study!
1 Month Commitment – 1 Week on Study Drug
2 Inpatient Stays in the Research Center
Must be willing to have a flexible sigmoidoscopy
and provide rectal biopsies at two time points
$1350 Compensation for Completion of All Study Visits
Please contact Dr. Kevin Brown at or
(919)962-0029 if you would like to learn more!