Vitamin C refers to chewable vitamin C tablets, which generally do not cause constipation. Chewable vitamin C tablets are mainly used for the prevention of scurvy, a variety of acute and chronic infectious diseases as well as an adjunctive treatment of purpura. Taking the drug will not cause constipation. Chewable vitamin C tablets may cause urate, cysteinate or oxalate stones when taken in large quantities, and overdose may cause diarrhea, headache, frequent urination, nausea, vomiting and other adverse reactions. Contraindications are unclear. Taking vitamin C chewable tablets generally does not cause constipation, constipation needs to be considered for a long time inactivity or eating too little fiber food and other reasons for constipation, but also may be intestinal flora imbalance, indigestion, intestinal polyps and other causes of constipation. Take vitamin C chewable tablets should be under the guidance of a doctor, such as constipation, through the life of dietary adjustments did not improve, it is recommended to consult a doctor in a timely manner, to clarify the causes of constipation, the cause of treatment.