I do not know the details of your coronal brow lift surgery, so I am assuming the nerve damage to which you are referring is some loss of sensation at the top part of your head. There is nothing to take for this issue. It may improve some over time, but there is frequently some loss of sensation to the top of the head after a coronal brow lift.
Since you didn't specify what kind of nerve injury I'm going to cover a couple possibilities: It is almost universal that there will be numbness from the incision line backwards some of which may recover with time. However some patients get chronic pain from the nerve injury and have to employ medications for chronic pain such as gabapentin. In rare cases the nerve that moves the forehead muscles becomes injured paralyzing one or both sides. This paralysis usually recovers but some are left with permanent weakness. Hope this answer helps