Gumweed herb (Grindeliae herba)

Published January 17, 1991.
List of German Commission E Monographs (Phytotherapy)


Name of Drug

Grindeliae herba, gumweed herb.

Composition of Drug

Gumweed herb consists of the dried tops and leaves of Grindelia robusta Nutt. and/or G. squarrosa (Pursh) Dunal [Fam. Asteraceae], gathered during flowering season, as well as their preparations in effective dosage.

The drug contains essential oil.


Catarrhs of the upper respiratory tract.


None known.

Side Effects

In rare cases irritation of the gastric mucosa.

Interactions with Other Drugs

None known.


Unless otherwise prescribed:

Daily dosage:

4 - 6 g of drug or 3 - 6 g gumweed fluidextract (Erg. B. 6); tincture (1:10 or 1:5. ethanol 60 percent - 80 percent [v/v]), 1.5 - 3 ml; equivalent preparations. Mode of Administration Comminuted herb for teas and other galenical preparations for internal use.


In vitro antibacterial.