The simethicone oil emulsion 30ml does not have to be drunk at once, mainly depends on the specific use of the pathway, generally can be used for the treatment of children’s flatulence, used as an additive to the contrast suspension, used before colonoscopy. 1. Treatment of children’s flatulence: baby flatulence can be a one-time use of 1 ml of simethicone emulsion, taken before or after feeding, but note that the specific dosage needs to be used in accordance with medical advice. 2. As an additive to contrast suspension: 4-8 ml of dimethicone emulsion can be added to 1 liter of contrast medium for double contrast radiography. 3. Used before enteroscopy: as a commonly used drug in enteroscopy, dimethicone oil can be consumed 30 ml at one time, mainly for eliminating intestinal foam and facilitating observation. There will be no adverse reaction or allergy after drinking it, and it will not change the test result. It is recommended that the use of drugs must follow the doctor’s instructions, do not self-medication, so as not to cause serious consequences.