You can do the cleanses and no to most of your supplements.
Keep in mind no pharamaceutical meds. So only herb, such as food herbs. Ginger, tumeric, grape seed, pau d'arc is ok, basically anything you can get in seed form and ground.
As you know the budwig plan you start off slow with honey and flax seeds. Make sure you do not store the ground flax seeds and grind only as you need.