As of 2015, Iberogast is available for purchase on Amazon.com. Controlled clinical studies have shown that use of Iberogast can significantly reduce symptoms of functional dyspepsia and irritable bowel syndrome, according to an article posted by the National Institutes of Health.
Iberogast is a preparation of herbs, consisting of Iberis amara fresh plant extract, Chelidonii herba, Cardui mariae fructus, Melissae folium and Carvi fructus. Additional ingredients include Liquiritiae radix, Angelicae radix, Matricariae flos and Menthae piperitae folium, states the NIH. The pharmacological effects, toxicity, tolerability and therapeutic effectiveness of Iberogast were clinically recorded. Researchers found that therapeutically-effective doses were toxicologically safe, and that Iberogast only targets the enteral nervous system and gastrointestinal tract, leaving the central nervous system unaffected.