How soon can you ride after horse's teeth are floated?

If the horse had no other major procedures performed besides the float (teeth pulled, caps removed, etc.), then most horses are fine being ridden the same day after the float. However, if the horse was tranquilized during floating, it's probably best to wait until the next day to make sure the horse has fully recovered from sedation. If you are still worried, you can try riding without a bit for a day or two.