What is it?
Blue Flag is an herbal medicine used for skin diseases, constipation (trouble having a bowel movement), skin rashes, and liver problems.
Other names for Blue Flag include: Iris Versicolor.
Ask your doctor, nurse, or pharmacist if you need more information about this medicine or if any information in this leaflet concerns you.
Tell your doctor if you
- are taking medicine or are allergic to any medicine (prescription or over-the-counter (OTC) or dietary supplement)
- are pregnant or plan to become pregnant while using this medicine
- are breast feeding
- have any other health problems, such as high blood pressure or heart or blood vessel disease
Talk with your caregiver about how much Blue Flag you should take. The amount depends on the strength of the medicine and the reason you are taking Blue Flag. If you are using this medicine without instructions from your caregiver, follow the directions on the medicine bottle. Do not take more medicine or take it more often than the directions tell you to.
To store this medicine:
Keep all medicine locked up and away from children. Store medicine away from heat and direct light. Do not store your medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down and not work the way it should work. Throw away medicine that is out of date or that you do not need. Never share your medicine with others.
- Before taking Blue Flag, tell your doctor if you are pregnant or breast feeding
- Fresh root can cause you to throw up and have an upset stomach (3,4)
- Do not take too much or too often (3)
Stop taking your medicine right away and talk to your doctor if you have any of the following side effects. Your medicine may be causing these symptoms which may mean you are allergic to it.
- Breathing problems or tightness in your throat or chest
- Chest pain
- Skin hives, rash, or itchy or swollen skin
Other Side Effects:
You may have the following side effects, but this medicine may also cause other side effects. Tell your doctor if you have side effects that you think are caused by this medicine.
- Vomiting (throwing up) or an upset stomach (3,4)
1. Bradley PR (ed): British Herbal Compendium, Vol 1. British Herbal Medicine Association, Bournemouth, UK; 1992.
2. Anon: British Pharmaceutical Codex 1934. Pharmaceutical Press, London, UK; 1934.
3. Mabey, R (ed): The Complete New Herbal. Elm Tree Books, London, UK; 1988.
4. McGuffin M, Hobbs C, Upton R et al (eds): American Herbal Products Association's Botanical Safety Handbook. CRC Press, Boca Raton, FL; 1997.
Last Updated: 1/4/2018