What happens to my dogs medicine Tresaderm if I forgot to put it back
into the referigerator after using it.  It has been out of the fridge
for 48 hours.  IS the medicine safe to use? or do I need to go to the
vet and get a new bottle?

Tresaderm is stablized only when it's refrigerated.  I would call the
vet in the morning for a new prescription.  Don't take a chance on
adminstering the med when it's warm.  It must be refrigerated.

Hope this helps,
tlspiegel

Good idea, thank you.