unfortunately i am not aware of what homeopathics you have access to in switzerland. You can try searching for ‘liver detoxing homeopathics’ in your area and see if anything comes up. I am not sure with switzerland laws but you may only be able to get homeopathics through a homeopath in switzerland. They will not which brands to use for liver support.
Otherwise for a cleanse you could try dandelion root tea, grapefruit, beets, N-acetyl-cysteine, cruciferous veggies, milk thistle and lemon water.