A short time later — after a few minutes; indicates the time a few minutes after the referenced moment.
数分後、彼は戻ってきて『済んだ』と言った。
A few minutes later he came back and said, 'It's done.'
会議が終わって数分後に雨が降り始めた。
A few minutes after the meeting ended, it started to rain.
薬を飲んでから数分後に眠気が来た。
A few minutes after taking the medicine, drowsiness set in.