Hi and welcome ot XXXXXXX
First,I would like to know how high it is? and is there any abnormality with other liver specific tests( AST.ALT. GGT,ALP)?
is elevated in various conditions. Most commonly liver and gallbladder
issue and sometimes hemolytic anaemia.
If there is just slight elevation then this can be seen in gallbladder stone, fatty liver
or just temporary hyperbilirubinemia. These conditions are not related to alcohol and drugs.
Other causes are alcohol,drugs,viral hepatitis
,cirrhosis, autoimmune diseases,and these are more serious and should be treated. TO evaluate all this he should do at least liver ultrasound
and viral markers. This would reveal is there something to be concerned about or not.
Wish you good health. Feel free to ask. Regards