Assuming that you mean you're withdrawing sugar from your diet, the answer is most likely no. However, I recommend that you discuss this with your doctor
. The effects of sugar withdrawal have a lot to do with addiction
and cravings, which can make you feel fatigued, tired, irritable, and anxious. Sugar does also affect levels of hormones call insulin and glucagon, which can affect the way the liver processes sugar and controls blood sugar levels.
Elevated liver function tests, however, are a sign that the liver cells are being damaged enough to break apart and release enzymes that are normally inside the cell: the AST and ALT are both enzymes that are normally inside liver cells, so when the levels in the blood increase that means the cells are leaking the enzymes. People can have transiently elevated AST/ALT after drinking, since the alcohol can cause some leak of the enzymes, and they can also have abnormal values due to drugs or certain diseases. One of the well-catalogued side effects of terbinafine is a change in liver function tests, and at the extreme terbinafine can actually cause significant liver damage. It is therefore really important that you discuss these results with your doctor and whether you should stop taking the drug.