Help your clients to avoid unnecessary courses of antibiotics!
I recommend a trio of uva ursi, d-mannose, and alkalizing the urine. D-mannose (a nonabsorbed sugar) is released from the body via urine and encourages bacteria to release their grip on the lining of the urinary tract – in favor of grabbing ahold of one of their favorite food sources. Uva ursi is a potent, herbal antibacterial.
This is a physician-penned blog article with more detail about d-mannose which might be interesting to you – and perhaps also inspiring to your clients to try this seems-too-good-to-be-true remedy: http://tahomaclinic.com/2011/01/d-mannose-for-bladder-and-kidney-infections/
I find that both D-mannnose and uva ursi are both easy to source at local health food stores or online (e.g. Amazon). D-mannose at 1000mg, 2x/day to counter an existing infection. Uva ursi at 2-3x/day, the maximum recommended dose on the supplement label. My favorite bland is Thorne’s “Uristatin”. Note that uva ursi is not safe for everyone; it is not recommended for children or individuals with liver disease (but still use the d-mannose on its own which is often quite effective!). For my clients who wrestle with chronic UTIs, I recommend they take 1000mg d-mannose daily as a preventive measure.
The reason I recommend alkalizing the urine (raise its pH) is that uva ursi is believed to be more effective at an alkaline pH. You can help your clients to improve the acidity of their urine (and maximize the effectiveness of this remedy) by encouraging them to eliminate (at least temporarily) soda, coffee, black tea, cow dairy foods (especially cheese), too much animal protein, and grains. This means stopping any cranberry juice too (cranberry extract is fine) – a surprising step to many practitioners. For the same reason, I would avoid Vitamin C supplements if they are in the form of ascorbic acid (of course, plentiful Vitamin C via natural food intake is very welcome). Cranberry juice can be effective on its own in mild cases but may interference with maximum effectiveness if the infection progresses and uva ursi needs to be used. This article might be of interest on how cranberry metabolites impair e-coli adhesion to the urinary tract wall (the same mechanism via which d-mannose works as well): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3370320/
Of course, you also want to make sure your clients are drinking plenty of fresh, clean, plain water to help to flush the infectious microbes from the body throughout treatment.