【单选题】【消耗次数：1】
男性，72岁，规律性上腹痛5年，多于空腹出现，夜间为著，进食可缓解，近1周来出现黑便，1-2次/日，便潜血(+++)，Hb 98g/L，既往2月前急性心肌梗死，现规律口服阿司匹林、氯吡格雷，治疗应首选哪种药物（ ）
①
碳酸氢钠
②
泮托拉唑
③
法莫替丁
④
奥美拉唑
⑤
铝碳酸镁
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