this may be by food poisoning
. other person may or may not be affected.
give tab domperidone
5mg DT 2-3 times for 1-2 days along with pre & pro biotic combination like bifilac sachet 2-3 times daily for 3 days. if stomach pain than give syp cyclopam
about 10ml when ever required. give curd, banana & rice preparation. give plenty of WHO ORS or plain water to prevent from dehydration
for future eat fresh food, if taken from out side take care of hygine.