Frontline and medicated shampoo?

It depends on what kind of "medicated" shampoo you are using. If it is flea shampoo, do not use it. You should never double-dose on similar medications, and both frontline and flea shampoo are insecticides.

If it's an "itch-relief" shampoo, it's probably OK. But you're probably better off not shampooing the dog at all since it will wash some of the frontline off. If the dog is having a terrible reaction to the flea bites, a small amount of children's benadryl would be good (adjust how much you give the dog based on the dog's weight - see the link below) and probably work better than the shampoo, since it will actually stop the reaction to the flea bites.

I have been told not to double treat the dog.

In this case using frontline is one treatment and then using flea shampoo is another treatment for the fleas. I would go with a all natural shampoo that wont harm the dog like earth bath products.

what kind fo medicated shampoo? if your talking about flea shampoo i wouldnt just in case it reacts with the frontline. just use a moisturizing shampoo, and if there are some spots that they have scratched red, then use calamine lotion, it really helps!

Should be safe..

bl