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Iberogast, also known as STW5, is a liquid formulation of nine herbs. A proprietary blend, it was developed in Germany in 1961 and is available (without prescription) in other countries. Named after the genus (Iberis) of one of its ingredients, it is also claimed to possess anti-inflammatory, antioxidative and free radical-inhibiting properties as well as reduce gastric acid secretion.[1]

Iberogast is a mixture of extracts from bitter candytuft (Iberis amara), angelica root (Angelicae radix), milk thistle fruit (Silybi mariani fructus), celandine herb (Chelidonii herba), caraway fruit (Carvi fructus), liquorice root (Liquiritiae radix), peppermint herb (Menthae piperitae folium), balm leaf (Melissae folium) and chamomile flower (Matricariae flos).[2]

Medical uses[edit]

A meta-analysis demonstrated that iberogast was effective in relieving the symptoms of functional dyspepsia.[3] Additional research has supported its effectiveness in the relief of functional dyspepsia as well as irritable bowel syndrome.[4]


  • The Canadian distributor claims no side effects.[5]


  1. ^ Wegener T, Wagner H (2006). "The active components and the pharmacological multi-target principle of STW 5 (Iberogast)". Phytomedicine 13 (Suppl 5): 20–35. doi:10.1016/j.phymed.2006.07.001. PMID 16926095. 
  2. ^ Saller R, Pfister-Hotz G, Iten F, Melzer J, Reichling J (2002). "[Iberogast: a modern phytotherapeutic combined herbal drug for the treatment of functional disorders of the gastrointestinal tract (dyspepsia, irritable bowel syndrome)--from phytomedicine to "evidence based phytotherapy". A systematic review]". Forschende Komplementärmedizin und Klassische Naturheilkunde (in German) 9 (Suppl 1): 1–20. doi:10.1159/000068645. PMID 12618546. 
  3. ^ Melzer J, Rösch W, Reichling J, Brignoli R, Saller R (2004). "Meta-analysis: phytotherapy of functional dyspepsia with the herbal drug preparation STW 5 (Iberogast)". Alimentary Pharmacology and Therapeutics 20 (11–12): 1279–87. doi:10.1111/j.1365-2036.2004.02275.x. PMID 15606389. 
  4. ^ "gizund - Iberogast". gizund. 26 September 2015. Retrieved 27 September 2015. Irritable Bowel Syndrome - Strong Treatment Effectiveness 
  5. ^ http://www.iberogast.ca/question/does-iberogast-have-side-effects/

External links[edit]