Is there any contraindication to the use of Metformax 500 and a slimming supplement?

Because you do not give the name of the dietary supplement you want to take, it is difficult to say whether there will be no interactions between the preparations. Due to the fact that Metformax affects the metabolism of sugars and blood glucose levels, it should be used together with diet and exercise. Therefore, I suggest that you consult a dietitian who will teach you the principles of healthy eating and develop appropriate nutritional recommendations. If this is not necessary and this is not the doctor's recommendation, it is better to abandon the use of dietary supplements. If you think that the use of a specific dietary supplement is necessary for you, I encourage you to consult your doctor. Perhaps he will decide to modify the current treatment regimen. The use of any preparation, including the one available without a prescription, you should consult with the attending physician. I enclose a detailed description of the preparation you are taking: https://www.gdziepolek.pl/produkty/48570/metformax-500-tabletki/ulotka/8862