Sodium bicarbonate of rhubarb is not effective for constipation. Sodium bicarbonate of rhubarb, a digestive system drug, is a compound preparation composed of rhubarb, sodium bicarbonate and peppermint oil. It is used to treat symptoms such as lack of appetite and excessive stomach acid, rhubarb can stimulate taste receptors and gastric mucosa, reflexively stimulate the hypothalamus feeding center, cause increased secretion of saliva and gastric juice, and enhance appetite. And it can cause mild gastric congestion and improve gastric absorption and digestion. Sodium bicarbonate is an antacid, which can neutralize the excessive secretion of gastric acid. Therefore, the combination of the two can play a role in enhancing digestion and antacid. It should be noted that overdose of this product will inhibit gastric acid secretion, which can cause nausea, vomiting, diarrhea and other digestive symptoms. It is forbidden for those who are allergic to rhubarb, sodium bicarbonate and peppermint oil; use with caution in pregnant and lactating women, allergies, children and the elderly. Rhubarb sodium bicarbonate tablets should be used under the guidance of a doctor.