Is it normal to have green stools after taking antibiotics to combat a sinus infection?

It is possible for antibiotics to cause changes in stool color for some individuals, but it is unlikely to be the sole factor. A change in diet, particularly an increase in green vegetables or fiber, could also be a contributing factor. However, it is important to consider other symptoms such as weight loss, blood in stool, persistent abdominal pain, or fever. If none of these symptoms are present, there is likely no need for concern.