So I just came home after 2 hours driving lesson and Axel has a swollen muzzle
he was in his crate so there should be nothing dangerous that he could've eaten or chewed on. He doesn't seem to be bothered by it except for some momentary rubbing of nose on the floor. Is there any antihistamines that I can try giving him before I panic and take him to emergency vet? I called them and they said they can offer a consultation...which would cost me only ÂŁ140.00

because he is happy and running about the flat I don't want to rush him there and pay such ridiculous money if it's just something a trip to Boots can sort out 
Is Benadryl or something similar ok for dogs?
Is Benadryl or something similar ok for dogs?