The investigators want to give the suspension by the authorized drug called Noxafil. On the other hand an aqueous solution will be made by adjusting the pH to 1.2 (which is conform with the pH of the stomach) and given to the volunteers by the stomach catheter. This 2 formulations will be tested in a fasted state and a fed state (by giving 2 Ensure plus shakes to the volunteers before the experiment starts). After intake of the formulation, gastric and duodenal fluids will be aspirated by the catheters and analyzed at their laboratory. So the four conditions the investigators want to study are: