Thank you for this suggestion.
Because this report is currently implemented as an OpenHealth service (external plugin report) - it cannot access the HealthFrameWorks reference content database which contains that mapping of brand names to generic names.
We've added a bug report to track this request and will likely create a new (builtin) report which contains this generic drug information as well. Because of our current HealthFrame v3 release process - and because this change doesn't require data changes, it will probably NOT be part of the initial HealthFrame v3 release, but hopefully not too long after.