As the pharmaceutical industry keeps growing, the presence and impact of drug residues in water is becoming increasingly well documented. These end up in wastewater after human consumption, and then in surface water if they are not sufficiently removed in wastewater treatment plants, harming aquatic organisms even in minute quantities. Antibiotics and NSAIDs are the most worrying for the environment. We would recommend here a reduction in their prescription in urinary tract infections, considering that spontaneous healing occurs in half of the cases. We indicate more natural alternatives, with a reasonable level of safety despite a low level of evidence.