A drug carrier, a drug structure, a purpose of the same, a method of making the same, and a method of using the same to inhibit H. pylori are revealed. The drug carrier includes a negatively charged polymer, chitosan and magnetic particles. The purpose of the drug carrier is to make a drug for inhibiting H. pylori. The drug structure includes a negatively charged polymer, chitosan, magnetic particles and an active ingredient. The method of making the drug structure includes mixing the negatively charged polymer solution, the chitosan solution, the magnetic particles and the active ingredient solution to form an initial solution and allowing ingredients in the initial solution to react and thereby form drug structure particles. The method of using the drug structure to inhibit H pylori includes administering the drug structure to an H. pylori colony. The drug carrier and drug structure demonstrate enhanced therapeutic efficacy.本發明提供一種藥物載體、藥物結構、其用途、其製備方法及使用其抑制幽門桿菌之方法。該藥物載體包含帶負電聚合物、幾丁聚醣及磁性粒子。該藥物載體的用途為製備抑制幽門桿菌之藥物。該藥物結構包含帶負電聚合物、幾丁聚醣、磁性粒子及活性成份。該藥物結構的製備方法包含提供具有上述藥物結構中的成份之溶液並加以混合成初始溶液,該初始溶液中各成份進行反應形成藥物結構粒子。使用該藥物結構抑制幽門桿菌的方法為投予有效劑量的該藥物結構至一幽門桿菌群體。藉由如上所述之藥物載體及藥物結構,可以使藥物載體或是藥物結構的治療效果能更進一步提升。