high level of gamma gt

Hi, I am moner and i have questions regarding my liver function test enzymes specifically gammat gt . I have taken my blood test twice and my last test showed a significant increase which is 370. I am not drinking alcohol niether smoke. I was taking zocor (zimvastatin)  before on and off but i stopped about a month ago before my blood test taken . All the liver enzymes were normal except for gamma gt. I remembered 2006 when i was having a smalll stone in my kidney i was injected with acetaminophen for pain. Fortunately the pain was gone but the following day i was vomiting and become jaundice. and rushed to hospital for admission. Everything was normal except for high biliary values. Now this time i thought of a blood test for my cholesterol and it found out that one of my enzymes in liver was abnormal. I didnt know that since 2006. My question is can there be a medication that can lower my gamma gt? Would increase can lead to liver damage and why i got high level of gamma gt when i live a healthy lifestyle?