I shared my plate of breaded sea scallops with my dog lastnight and now he's sick!?

What should I do? I gave him a little Immodium earlier and that helped a good bit, then a little while ago I gave him 1/2 a baby aspirin. He's up now and acting much better...think he'll be alright now?
Update: Any suggestions I should try if he becomes sick again? My vet doesn't have after hour-hours. He's just been upset on the stomach and some diarrhea earlier today.
Update 2: Dogs can have human medicines, only certain ones. I used to study it.
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