Caffeinated Drinks
Caffeine is a gastrointestinal stimulant, and those with IBS and those susceptible to symptoms such as vomiting are advised to avoid it. Drinks like coffee, soft drinks, and black or green tea have enough caffeine to irritate the digestive system easily. Caffeine can also worsen predominant-diarrhea due to its strong diuretic properties.
While caffeine also has many health benefits, people with IBS should be looking for alternatives. It is also good to avoid carbonated drinks, as they often cause gas and bloating.