What are the side effects of probiotic chewable tablets?

The most common side effects of probiotic chewable tablets are stomach gas and bloating, according to WebMD. These symptoms shouldn't interfere with treatment, but notify the doctor if the issue persists or worsens.

Other more serious side effects can occur, but are unlikely. WebMD advises that sudden, serious signs of infection, including coughing, chills and high fever, warrant an immediate appointment with the doctor. Serious allergic reactions to chewable probiotic tablets are rare. However, it's important to seek immediate medical attention if symptoms of allergic reaction occur, including rash, itching, dizziness, trouble breathing or swelling of the face, tongue, or throat, states WebMD. Allergic reactions can become life-threatening if left untreated.