The antibiotic is one of the most prevalent drugs used in treatment of many ailments and diseases. Although there are several types and categories for antibiotics but they all poses the same risk for adverse side effects. The side effects or the adverse effects range from simple side effects due to the nature of the pharmacological substances of the antibiotic till serious toxicity due to the substance itself or any of its metabolites in the body.

The simplest side effect is the diarrhea associated with the administration of the antibiotics, especially in long course treatments. This occurs because the antibiotic affects the normal existing flora in the gastrointestinal tract while affecting the pathogenic microorganisms in the same time so, it causes lose stool with abnormal motility pattern of the GIT. This could be easily solved with the usage of probiotics with antibiotics. The probiotics tend to preserve the normal flora of the gastrointestinal tract and regain the normal motility of the GIT. Other side effects related to the same cause are nausea and vomiting and probiotics are the best solution for both of them.