How does Costus work?
Costus root contains chemicals that seem to kill nematodes (worms). Some researchers think that the chemicals in costus oil might prevent the airways from constricting and lower blood pressure.
Are there safety concerns?
Costus seems to be safe for most people. However, costus often contains a contaminant called aristocholic acid. Aristocholic acid damages the kidneys and causes cancer.
Allergic reactions to costus root have occurred in people who are allergic to other plants and herbs in the Asteraceae/Compositae family. Members of this family include daisies, ragweed, chrysanthemums, marigolds, and many other herbs.
Do not use costus if:
- You are pregnant or breast-feeding.
Dosing considerations for Costus.
The appropriate dose of costus depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for costus. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.