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Guaiac wood (Guajaci lignum)

Published April 23, 1987.
List of German Commission E Monographs (Phytotherapy)


Name of Drug

Guajaci lignum, guaiac wood.

Composition of Drug

Guaiac wood consists of the heartwood and sapwood of Guaiacum officinale L. and/or G. sanctum L. [Fam. Zygophyll-aceae], as well as their preparations in effective dosage. The wood contains resin and saponins.


Supportive therapy for rheumatic complaints.


None known.

Side Effects

None known.

Interactions with Other Drugs

None known.


Unless otherwise prescribed:

Average daily dosage:

4.5 g of drug; equivalent preparations. Mode of Administration Comminuted wood for decoctions and other galenical preparations for internal use.

Note: The essential oil known as "guaiac wood oil" must be evaluated separately.