Before taking cephalosporin, it should be clear whether you are allergic to penicillins, or cephalosporins, and if so, you should never take cephalosporins. It is also best not to take iron preparations, such as ferrous succinate tablets or ferrous sulfate tablets, while taking cephalosporins. If you must take them at the same time, it is best to use iron-containing preparations three hours after taking cephalosporins. In addition, you should strictly abstain from alcohol while taking cephalosporins, and you should not take any food or medicine containing alcohol, including patchouli. Patchouli contains a large amount of alcohol, so you should not drink patchouli during taking cephalosporins either. It is better not to take antacids such as omeprazole or thiosemicarbazone during the period of taking cephalosporins, which may cause the absorption of cephalosporins to decrease.