You can adjust your promotion error configuration so Minfos will no longer consider products that are protected or flagged as drugs as being in error when adding them to a promotion. This will reduce the number of errors you need to accept when creating a promotion.
From the Minfos Launch Pad:
1. Click the Special menu and select Utilities.
The Utilities module is displayed.
2. Click the Config menu and select 1. Shop Configuration.
The Shop Configuration window is displayed.
3. Click the General tab.
4. Check the Ignore 'Is Protected' & 'Is Drug' Error Types checkbox.5. Click OK to save.