While there are no obvious reported side effects of Iberogast as a whole, some people do have a susceptibility to some of the components of the supplement:
• Chamomile side effects—chamomile is a member of the ragweed family of plants and as such does elicit an allergic reaction in some people with symptoms ranging from minor itching of the skin and throat swelling, to full blown anaphylaxis. If you have ragweed or related allergies, Iberogast is contraindicated for use.
• Licorice Root side effects—licorice root in both large and small doses have been reported to cause fatigue, headaches, high blood pressure and even cardiac arrest in some individuals. In addition, Licorice root contains the chemical glycyrrhizin, which can cause a condition called pseudo-aldosteronism in which you become overly sensitive to hormones from your adrenal cortex.
• Alcohol side effects—some preparations of Iberogast contain up to 30 percent alcohol content and therefore should be avoided in giving to children or to adults who are recovering from alcohol abuse or at risk of alcoholism.