在台灣傳統上「西藥傷胃」的觀念盛行，許多民眾一直存有吃藥傷胃的錯誤觀念，就醫時常不問適應症就要求開立胃藥，加上很多醫師開處方時，應病人要求，也喜歡加入胃藥，以至於胃藥實在有被過度使用的情形，不僅增加醫療支出，也可能導致副作用，嚴重浪費健保資源，基於建立民眾正確使用藥品及自我照護的觀念，共同珍惜醫療資源，呼籲民眾，胃藥不是萬靈丹，正確使用才是最重要。
　　而且「制酸劑」其主要功能在於中和胃酸，對於多數西藥造成的腸胃不適症並沒有實質幫助，所以常導致「胃藥」藥品的浪費，嚴重時影響治療結果，而到底是什麼因素使得這種情況不斷的發生？是病患本身的因素呢？還是醫師個人的因素呢？
　　有鑑於此，本研究將以南部某醫學中心之門診病患健保不給付下制酸劑用藥為例，進一步了解病患相關特質及醫師相關特質是否影響制酸劑藥品利用情形，希望能提供院方管理階層對於院內制酸劑使用管理之依據，並有助於提昇醫師用藥品質之參考。
　　本研究配合Aday and Andersen之醫療服務利用行為模式作為本研究理論性架構，將病患相關特質分為傾向因素、能用因素與需要因素對制酸劑利用之影響，其中包含：病患之性別、年齡及就醫科別、部分負擔、疾病診斷數目、有無重大傷病、有無慢性病及有無職業傷病等；再加入醫師相關特質探討對制酸劑利用之影響，其中包含醫師性別及年齡，而制酸劑利用情形包含：藥品費用、給藥數量及給藥日數。
　　擷取南部地區某醫學中心2010年1月1日至2010年12月31日期間之門診病患健保不給付之制酸劑用藥案件，進行資料整理及研究各變項之定義、分組，再利用SPSS統計分析套裝軟體進行描述性及推論性統計分析，進而分析影響其制酸劑利用之相關因素。
　　本研究結果發現個案醫院門診制酸劑之利用情形，會因傾向因素、需要因素及醫師相關因素而有所差異，因此，建議衛生主管機關與個案醫院管理者能針對上述之差異，來制訂與實施正確的制酸劑使用宣導、教育訓練與管理規範。

　　In Taiwan, the traditional concept "Western medicine hurts stomach" is prevalent, and many people have the misconception all the time. When they go to see a doctor, they often do not ask if antacids are appropriate for the treatment but require doctors to prescribe antacids. In addition, many physicians also prefer to prescribe antacids to patients’ requirement, and this may make antacids overused. In the case, it may not only increase health-care spending and lead to the waste of health-care resources, but also cause side effects. Based on the establishment of the public proper usage of drugs and self-care concept and cherishing medical resources, the authorities concerned should call on people that antacids are not a panacea, and the proper usage of them is the most important.
　　What makes this case occur often? It may be Patients' factors or physicians' factors. Take a southern medical center as an example, where outpatient health care doesn't cover antacids medication. The researcher wants to learn more about whether patient-related characteristics and physician-related characteristics affect the antacids usage. The researcher hopes to provide the hospital the basis of the management of the antacids usage, and to help improve the quality of physicians' prescription of antacids.
　　This research adopts Aday and Andersen’s Behavior Model of Health Service Utilization as the main research framework. The underlying characteristics of the patients are divided into "predisposing characteristics factors, enabling resources factors and need factors" on the utilization of antacids, including: patients' gender, age and medical part of the burden, the number of disease diagnosis, the presence of significant injuries, chronic illnesses, and whether the occupational injuries and diseases. Then add the physician-related characteristics to investigate the effect of antacids usage, which includes physicians' sex and age. The utilization of antacids includes: drug costs, drug delivery, quantity and dosing days.
　　In the research, the researcher extracts the cases from the southern Taiwan’s medical center, the cases' dates from January 1st, 2010 to December 31st, 2010. For data consolidation, and the definition of variables, grouped by households. We uses SPSS to run descriptive and inferential statistics and then to analyze the relevant factors affecting its system of acid utilization.
　　The research confirmed that the condition of antacids utilization is affected by the predisposing characteristics factors, need factors and physician-related factors. Therefore, I suggest that the health authorities concerned and the case hospital managers should formulate and implement the right antacids advocacy, education and training, and management practices.

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