Be sure to read the instructions carefully before feeding effervescent tablets to your child, and never let your child eat them directly in his mouth. Because this tablet needs a lot of water when it dissolves, and it will produce a lot of carbon dioxide. If the child eats directly into his mouth, the tablets will absorb all the water around him when they enter his throat, and then produce carbon dioxide, which will easily lead to suffocation of the child. The correct way to eat is: first take half a cup of cold water or warm water, about 100 to 150 ml, the water temperature should not exceed 80℃, put a dose of tablets in the cup, and take it after the bubbles completely disappear and the drugs are completely dissolved. In addition, you can't soak clothes with tea or drinks, because it will produce chemical reactions and may produce harmful substances. Children should take it under the care of their parents, not by themselves. Vitamin c effervescent tablets should be soaked now. If left for too long, drugs dissolved in water will fail due to oxidation.