Lactobacillus tablets are used to treat abnormal fermentation in the intestines, dyspepsia, enteritis and pediatric diarrhea. As long as they are taken reasonably, they usually have no side effects. However, if they are taken improperly or for a long period of time, they may produce side effects such as allergic reaction, adverse symptoms of the central nervous system and over-dependence. 1. Allergic reaction: If the patient uses the medicine improperly and is allergic to one of the ingredients in Lactobacillus tablets, it is easy to produce allergic reactions such as rash and itchy skin. 2. Adverse central nervous system symptoms: Extrapyramidal reactions may also occur, manifested as clenching of teeth, clenching of hands, unsteady gait, etc. This side effect is relatively rare. 3. Excessive dependence: Since lactobacillus tablets mainly act on the gastrointestinal tract to regulate the gastrointestinal flora and help the gastrointestinal tract to digest and absorb. Long-term use of the gastrointestinal tract will produce drug dependence, and if the drug is suddenly stopped, it may lead to gastrointestinal flora imbalance, but will aggravate the condition. When taking Lactobacillus tablets, patients should take it correctly under the guidance of a doctor, if the above symptoms occur, stop the drug immediately and seek medical attention.