Effervescent tablets are divided into two main categories: topical and oral. The topical type is usually used as medicine, and the oral type is mainly divided into two types: medicinal and health care effervescent tablets. Effervescent tablets are a newer type of pharmaceutical preparation that when placed in water releases a large amount of carbon dioxide gas in an effervescent reaction. 1. Topical effervescent tablets: such as metronidazole vaginal effervescent tablets, bisacodyl effervescent tablets, etc., are mainly used for the treatment of gynecological inflammation, and play an antibacterial and anti-inflammatory role. 2. Oral effervescent tablets: medicinal oral effervescent tablets are mainly used for the treatment of infections, colds and other diseases, such as acetylcysteine effervescent tablets, aspirin effervescent tablets and so on. Oral effervescent tablets for health care are mainly nutritional supplements, such as multivitamin effervescent tablets, calcium supplements effervescent tablets, vitamin C effervescent tablets, etc., which are used to supplement the body with vitamins and minerals. Effervescent tablets should not be taken with drinks or tea to prevent chemical reactions. Effervescent tablets contain more sodium, long-term use of large quantities may cause cardiovascular and cerebrovascular diseases. Patients with high blood pressure, high blood cholesterol and cardiovascular diseases should use it sparingly or cautiously. Should be under the guidance of a doctor to choose the right drug.