BUKO Pharma-Kampagne is an independent organization based in Bielefeld, Germany, which watches over the marketing practices of German pharmaceutical companies.
It has gained wider recognition after being described in a bestselling novel, The Constant Gardener by John le Carré. BUKO was mentioned explicitly in the author's afterword as a real counterpart to the novel's fictitious Hippo organisation (also based in Bielefeld, Germany).
BUKO is partially financed by the European Union and mostly by private supporters.