How long does vomiting/indigestion commonly last with food poisoning or similar illnesses? and what is the best way to treat these symptoms with the smallest possible risk?

Simple viral gastroenteritis & food poisoning have quite similar GI symptoms but viral infections may cause fever,headaches, aches& pains. Both resolve on their own after a few days. Rest,drinking lots of room temperature fluids including flat ginger ale & eating soft,bland nongeasy,nonspicy foods with no harsh roughage is the best approach. Kaopectate or imodium can be taken if diarrhea excessive