What is it?
Frangula is an herbal medicine used to treat constipation.
Other names for Frangula include: Alder Buckthorn, Rhamnus frangula, and Frangula ulnus.
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 breastfeeding
- have colon (large intestine) blockage or pain or Crohn's disease
- have any other health problems, such as high blood pressure or heart or blood vessel disease
Talk with your caregiver about how much Frangula you should take. The amount depends on the strength of the medicine and the reason you are taking Frangula. 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 Throw away medicine that is out of date or that you do not need.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 Frangula, tell your doctor if you are pregnant or breastfeeding
- Do not take Frangula if you have colon problems (blockage, pain, Crohn's disease) (3)
- Not for use in children under 12 years old (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.
- Blood in your stool (bowel movement) (4)
- Diarrhea or stomach cramping (4,5)
1. Bradley PR (ed.): British Herbal Compendium vol. 1. British Herbal Medicine Association, Bournemouth, UK; 1992.
2. Anon: British Herbal Pharmacopoeia. British Herbal Medicine Association, Keighley, UK; 1983.
3. Blumenthal M, Busse WR, Goldberg A et al.: The Complete German Commission E Monographs. American Botanical Council, Austin, TX; 1998.
4. Newall CA, Anderson LA, Phillipson JD: Herbal Medicines. A Guide for Health-care Professionals. Pharmaceutical Press, London, UK; 1996.
5. de Smet, PAGM et al (eds): Adverse Effects of Herbal Drugs 2. Springer-Verlag, New York, NY; 1993.
Last Updated: 1/27/2017