Clarithromycin Dispersible Tablets have a duration of action of around 12 hours, which may vary from individual to individual. The duration of efficacy is mainly determined by the half-life of the drug, the longer the half-life, the longer the duration of efficacy, but the shorter the duration anyway. Clarithromycin dispersible tablets after every 12 hours oral 250mg, its blood elimination half-life is 3 ~ 4 hours, and its metabolites for 5 ~ 6 hours. Clarithromycin belongs to the class of macrolide antibiotics, inhibitory effect on Gram-positive bacteria, some Gram-negative bacteria and some anaerobic bacteria, in addition, for mycoplasma also has an inhibitory effect. It can be used for nasopharyngeal infections, such as tonsillitis, pharyngitis, etc., lower respiratory tract infections, such as acute bronchitis, pneumonia, etc., skin and soft tissue infections, such as pustulosis, dengue (acute infectious disease, the skin can be seen to redden like paint), folliculitis, etc., as well as part of the urethritis and cervicitis. Clarithromycin dispersible tablets efficacy lasts for about 12 hours, adults are usually taken orally every 12 hours, according to the severity of the infection should be taken for 6~14 days, the specific dosage and course of treatment, should be used under the guidance of a professional doctor.