Many individuals suffer from acid reflux, an uncomfortable condition that makes eating and drinking difficult. Although medical professionals advise avoiding caffeinated beverages due to theories stating it causes or worsens symptoms of gastroesophageal reflux disease (GERD), caffeine does not appear to worsen symptoms of GERD; therefore if a flareup occurs after drinking coffee try decaf instead and see if that helps.

One of the primary factors contributing to an upset stomach when drinking coffee is dairy products like milk or cream. If you are lactose intolerant, drinking such drinks could trigger cramping and diarrhea; additionally certain sugars like high-fructose corn syrup or agave syrup could also be irritating to your system.

Some individuals experience stomach discomfort after drinking coffee due to stimulants like caffeine. Although this typically does not pose any significant health risks for most healthy adults, too much caffeine consumption may lead to rapid heart rate, jitters, headaches and nervousness if consumed in excess.

No matter the roasting method used, decaffeinated coffee typically contains between 1-2% caffeine. Depending on how it was decaffeinated, however, other stimuli like theophylline could still remain, which relaxes intestinal muscles and may make you have to go.

Studies have shown that decaf coffee may not cause as much gastroesophageal reflux as regular coffee; this depends on its ingredients and methods for decaffeination. One particular study, however, revealed that both coffee and tea caused gastro-oesophageal reflux for some participants while in others there was none – possibly due to differing techniques used to decaffeinate coffee beans.