Over and over again Ruth Welsh repeated that medicine made from the juniper plant must not be given to people with kidney problems. Ruth said,
Don't give them that. Don't give them that. Either give them the horsetail tea or the spruce [tea], never juniper….So that's a big red mark beside that one.
The juniper plant, with or without its berries, is used to make a tea for colds or an upset stomach. However the tea must be taken very sparingly as Ruth Welsh said,
Just a little bit. A couple or three tablespoons is about all you take.
The above ground or parts of the top of this plant are used to make medicine. The berries can be dried and kept on hand for later use.
Source: Andre, Alestine, Nan t'aih nakwits'inahtsìh (The Land Gives Us Strength) (2006)