Either the leaves or the whole bladderwort plant including the roots are made into a tea to treat kidney or bladder infection. The bladderwort and the horsetail plant are used in the same way for bladder ailments. Ruth usually makes her bladderwort tea strong but dilutes it before drinking it. Ruth said,
…start with cold water… rinse your plants and roots...and make sure they're clean...put...in cold water and…bring [slowly] to a boil….boil…for…four or five minutes, less...sometimes. And then I let it steep for a while before I strain it off. And that way you're not damaging too much of the good medicines that are in there.
Drink a quarter of a cup three or four times a day.
Source: Andre, Alestine, Nan t'aih nakwits'inahtsìh (The Land Gives Us Strength) (2006)