Amorphophallus konjac is a plant from which the dietary fiber and sugar supplement glucomannan is made. According to WebMD, possible side effects of solid glucomannan tablets include intestinal blockages and blocked throat passages. The supplement can also interact with medications taken by individuals with type 2 diabetes, as glucomannan is known to lower blood sugar levels, and can also decrease the effectiveness of certain prescription medications.
Healthwise notes that Amorphophallus konjac can cause significant levels of flatulence in individuals who do not consume regular high-fiber diets. Amorphophallus konjac pills may also expand inside of the esophagus, which in turn can lead to esophageal blockages in individuals with esophageal disorders.
According to Drugs, Amorphophallus konjac is not recommended for individuals with gastric abnormalities or women who are currently pregnant. It has also shown severe hypoglycemic side effects in individuals with diabetes. Additional potential side effects include bloating and diarrhea. Glucomannan was first utilized in China as a natural treatment for skin conditions, asthma, breast soreness and coughs. Amorphophallus konjac leaves are utilized to naturally ward off insects. When taken as a supplement, glucomannan helps to relieve constipation due to its natural laxative effects. Glucomannan also helps to balance insulin levels and prevent insulin surges in diabetics.