At present, the original levofloxacin tablet colestipol is mainly a 0.5g size tablet, which is usually taken once a day, one time a day. However, some generic drugs may have levofloxacin 0.1g a piece, and it is recommended to also take it according to 0.5g once a day, that is, once a day, 5 tablets at a time. Of course some renal insufficiency or elderly patients need to reduce the dosage when taking drugs, consider levofloxacin can be changed to take 0.2 or 0.3g a day, that is, once a day, each time 2 or 3 tablets. Quinolones are concentration-dependent antibiotics, and the bactericidal effect of the drug is closely related to the blood concentration, i.e. the higher the blood concentration, the stronger the bactericidal effect. Therefore, a one-time administration of adequate doses is more effective than a smaller dose. In addition, quinolones are prohibited for minors under the age of 18.