Medicine for the stomach and intestines; digestive medicine used for indigestion, stomachache, heartburn, etc.
食べ過ぎた朝に胃腸薬を飲んだ。
I took a digestive medicine the morning after overeating.
旅行には常備薬として胃腸薬を持って行ったほうがいい。
It's a good idea to bring digestive medicine as a staple when traveling.
食堂の味が合わず胃腸薬を買いに薬局へ行った。
The cafeteria food didn't agree with me, so I went to the pharmacy to buy digestive medicine.