Capstar appears to be a US vet approved only thing. I wondered, when the topic was viewed so many times without answers. This is why I like coming to this website-we get so many professionals here that don't want us making informed health decisions! It is an oral drug that works for 24 hours only (from what the vet said), only killing living fleas. My cat has had a few vets fail giving him oral meds-that is more traumatic for him than a bath. Frontline is now working very well.
Thank you very much!