Monuril is the branded version of Fosfomycin. It contains the same active ingredient and comes in the same form (granules for oral solution). They work exactly the same way to help kill bacteria that cause urinary tract infections. The only differences will be the packaging, visual appearance of the granules, and pricing. In most cases, the generic version of a treatment is cheaper, but, currently, Monuril is considerably cheaper than Fosfomycin. [popover id=ref3]