The present invention relates to a catheter comprising a balloon (10, 30) and at least one pharmaceutically active substance. To enable more accurate dosing of the pharmaceutically active substance, the pharmaceutically active substance is disposed in a reservoir (15, 35) inside the balloon (10, 30) or on the balloon (10, 30), wherein a wall (14, 32, 34) that closes the reservoir toward the outside comprises at least one predetermined breaking point (16). Furthermore, a system for applying an intraluminal endoprosthesis, preferably a stent, in a body cavity, and simple and cost-effective methods for manufacturing the catheter and the system are described.
