A product containing papain, bromelain or mixtures thereof is intended for use as a medicinal product at a dosage of at least 5000 mg administered for at least one day in a single dose. This dosage relates to papain powder having a titer of 3 U/mg and bromelain powder having a titer of 2 U/mg, and to a patient with a body weight of 55 kg. In the case of variations of the titer and/or of the patient's weight, the dosage must be varied in proportion to said variations.