There are capsules, extracts, and oils made from dandelion that may be found at herbal shops. As well as consulting your physician, be sure you follow the directions on the packaging.
It is possible to make a decoction by boiling thirty to forty grams of fresh dandelion roots in one liter of mineral water. This method is only applicable if you have access to fresh dandelion from a reputable supplier.
You also have the option of simmering three grams of dried dandelion leaves or blossoms in two hundred and fifty milliliters of water for a couple of minutes.