All of the following antibiotics may be used for healing duodenal and gastric ulcers, except:

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Rifampin (Rifadin) is primarily used for treating tuberculosis and does not play a role in the standard treatment regimens for Helicobacter pylori infection, which is a common cause of duodenal and gastric ulcers. Metronidazole, amoxicillin, and clarithromycin are commonly used antibiotics in combination therapy for H. pylori eradication.

All of the Following Antibiotics May Be Used for Healing