Cimetidine Tablets should be taken orally and should be used strictly according to the instructions or as prescribed by the doctor. Cimetidine tablets are mainly used to relieve heartburn (heartburn), acid reflux and stomach pain caused by excess stomach acid. The specification of the drug is generally 0.2g, patients need to take the drug orally, adults need to take 2 times a day, each time 1 tablet. The drug should not be taken more than 4 times in 24 hours at most, and it is prohibited for pregnant women, lactating women and those who are allergic to the drug. At the same time, the drug should not be taken for more than 7 consecutive days, if the symptoms are not relieved, it is necessary to consult a physician. If patients use the drug for a long time or in large doses, adverse reactions such as gynecomastia, diarrhea, dizziness, lactation phenomenon, loss of libido and other symptoms may occur, and some patients may also experience mental disorders and other symptoms. In addition, some patients may also experience adverse reactions such as sore and hot throat, unexplained bleeding or ecchymosis, and unusual tiredness and weakness. If the drug is used in children, it should be used under adult supervision and physician’s instruction, and the drug should be placed in a place inaccessible to children. Patients are advised to take cimetidine tablets according to their own conditions and under the guidance of a doctor, avoiding unauthorized use of the drug or changing the dosage of the drug. If symptoms occur during the course of the medication, please consult a doctor promptly.