Reed seems to have quite a limited use in the herbal medicine box, and all use best left to be prescribed by a qualified herbalist for safety and probably to be kind to the tastebuds too.

As with all natural remedies consumption of Reed
should be guided by a qualified herbalist or physician.
This information here is for information purposes only,
and certainly not for prescription.

best use ...  

blood cleanser, but only through preparations made by herbalists, so not for home remedy use

qualities of Reed are said to be ...

emmenogogue - fluid and toxins cleared through blood flow, balancing menstral flow

Rhizomes are sometimes prepared by herbal physicians to stimulate blood circulation, prevent blood clots and other blood therapies. Reed is far from being a home remedy though.

toxicity? ...  as all plants have a nourishing level and toxic level

The taste causes humans to probably not even consume enough to be toxic, but as it has an effect on blood flow the guidance of a professional herbalist is quite essential.

to read about the crafting potential of Reeds, please click here