Hello, tusher8604,
Liver enzyme elevations are not an expected side effect of
Diphenhydramine.
You mention you drank alcohol a month ago. If you were drinking on a regular
basis before, it is possible that your liver enzymes could remain abnormal
especially ALT,GGT, not so much the LDH & SGOT.
You also mention that you are on a low calorie diet. You must be doing this
to lose weight. If you are 10-15 %
overweight , it is possible you may have
Fatty Liver (Non-Alcoholic-Liver-Disease).
Get a complete liver profile, blood count,diabetes check, and also screening
for
Hepatitis B & C.
If you are on any other medications such as Ibuprofen,Naproxen (NSAIDs) , they
can cause
liver damage.
Hope this helps you so that you can discuss with your doctor.
I wish you well.