The tree is native to South and Central America. Despite its name, the drug's main source is San Salvador. There are no known medical conditions that preclude use of this medication. Whether taken internally or externally, large quantities of this medication can damage the kidneys. Used externally, Balsam of Peru often causes skin reactions such as eruptions, ulcers, swelling, and red patches.
Allergic reactions are also possible from internal use.
Because Balsam of Peru may increase your sensitivity to sunlight, minimize your exposure to the sun while using this medication. No interactions have been reported. No harmful effects are known. How To Prepare Preparations are available for both external and internal use. Do not apply for more than 1 week.