You note a mildly elevated ALT level. Hepatitis screen negative. Certainly medications can be a possibility - some of the psychiatric and anti-depressive medications may be responsible.
If you drink alcohol, one considerations would be to abstain and recheck the enzymes after a period of time.
Given the slightly elevated levels, you may want to consider an abdominal ultrasound. This can evaluate for fatty liver, as well as other diseases that can affect the liver and elevate the bilirubin (i.e. gallbladder disease).
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
Medical Weblog:
kevinmd_b