How can you tell if xarelto is therapeutic?

You can't!: Check out http://www.Xarelto-us.Com/. Xarelto's advantage over warfarin is that it doesn't require monitoring (regular blood testing) to determine if it's therapeutic or not b/c it's not affected by food, specifically vitamin k. Once you take it, it starts going to work immediately. Of course, that is also its achilles tendon b/c there's no good easy way to stop bleeding, unlike vit k for warfarin.

Xarelto: Xarelto is used to prevent strokes and reduces formation of blood clots caused by atrial fibrillation as long as you stroke free you can consider the drug to be therapeutic.