Usually, the side effects of Clarithromycin are mild and usually do not cause serious adverse reactions. Common side effects include insomnia, headache, dyspepsia, abdominal pain, rash, excessive sweating, nausea, and abnormal taste. Common dosage forms of clarithromycin include tablets, capsules, granules and dry suspension, which are antibiotics and are suitable for nasopharyngeal infections, lower respiratory tract infections, soft tissue skin infections and legionella infections. It should be noted that, allergic to this product or macrolides are prohibited, moderate to severe renal impairment and liver function impairment, should be used with caution. For people who need to use Clarithromycin need to go to the regular hospital interview, under the guidance of the doctor to use the drug, do not unauthorized use of drugs.