Benadryl or Alavert?

My daschund has several hard, crusty sores on her body.  I took her to the vet and they gave me antibiotics and took a scraping for fungus but the results will take two weeks to come back.  Yesterday she was scratching and I know she can have Benadryl, so I have her half a tablet morning and night, but the poor thing was so sleepy!  Today she seems much better and there seem to be fewer sores, so I was wondering if it would be okay to give her Alavert instead since it is non-drowsy?  She weighs 12 lbs.  If it's okay, do I give her a quarter of a tablet, and can I give it for 3-4 days or until she seems better?  

[Twix363]

I would stick with the Benadryl, if you think it's too strong I would try baby Benadryl if you are not using it now.