Sorry,I realized that my reply is a bit confusing.
Yes, you can use benadryl with copaxone together.
And no, there are no interactions.
Happens sometimes when my thoughts are way ahead of my typing,
or when pressed for time!
Hey Jessica.
Happy New Year and Welcome to the forum.
According to the Multi-Drug Interaction Checker the answer is no,
there's no interaction-as long as they're taken as directed.
Hope this helps.
Take care.
Niko