Dear sir, it can definitely be caused by medicines but its also possible that he had liver damage
before the accident. the best way to rule this out is to do US or CT scan
of liver and liver biopsy
, especially if enzymes levels dont fall in next 1-2 month. Also such a huge trauma can cause multiple organs failure and disorders, but if he doesnt have any symptoms, jaundice
or blood abnormalities then there is no reason to be concerned. Just need to do tests i ve mentioned and wait for recovery.
Wish you good health, Dr Ivan Romich