It is a bad idea to use diuretics, when it is not strictly necessary. In the best of the cases, I would recommend you to drink dandelion root infusions, but definitely no diuretic drugs, since this can get you into trouble with your kidneys. The best way of preventing all this bloating and water retention would be by using all the right ancillaries. Also, you can reduce salt intake, and drink more water – this will also help big time.