Guaiac is a tree. The wood and sap (resin) are used to prepare medicinal extracts. Be careful not to confuse guaiac wood or guaiac resin with guaiac wood oil.
People take guaiac wood for muscle and joint pain (rheumatism), breathing problems, skin disorders, and syphilis. It is also used for preventing gout.
Guaiac wood is used in mouthwashes to kill bacteria.
In the laboratory, guaiac resin is used in tests for finding hidden blood in urine and stool.
As a flavoring agent, guaiac wood is used in foods and in edible oils and fats.
How it works
There isn't enough information to know how guaiac wood or resin might work.
Not ProvenRheumatismGoutLung problemsSkin problemsSyphilisUse in mouthwashesOther conditions
Guaiac wood and guaiac resin seem to be safe for most adults in the amounts found in foods and in small medicinal doses. Higher doses can cause some side effects including diarrhea and stomach and intestinal problems. Guaiac wood and guaiac resin can also cause skin rashes.
Pregnancy and breast-feeding: Not enough is known about the use of guaiac wood and guaiac resin duringpregnancyandbreast-feeding. Stay on the safe side and avoid use.Are there any interactions with medications?
Swelling (inflammation): Don't use guaiac wood or guaiac resin if you have any condition that involves swelling.
Guaiac wood and resin might have an effect like a water pill or "diuretic." Taking guaiac wood and resin might decrease how well the body gets rid of lithium. This could increase how much lithium is in the body and result in serious side effects. Talk with your healthcare provider before using this product if you are taking lithium. Your lithium dose might need to be changed.