The ALT is minimally elevated. Alcohol and side effects from various medications can transiently raise the ALT levels.
A normal ultrasound is reassuring. You can consider blood tests to look for hepatitis.
If the tests continue to be negative, I would serially monitor the liver enzymes to ensure they do not rise.
This option can be discussed with your personal physician.
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.
http://www.straightfromthedoc.com