Thanks for your question on Healthcare Magic.
I can understand your concern.
Yes, you should should definitely take him to the hospital without wasting much time.
Sudden
abdominal pain,
vomiting, sleepiness, weakness etc are suggestive of abdominal pathology like peptic perforation,
acute gastritis,
cholecystitis etc.
So better to take him to the emergency room and get done clinical examination of abdomen and
ultrasound examination of abdomen to diagnose the cause.
He will need intravenous fluids, intravenous antibiotics, antacid and anti emetic drugs.
Don't worry, he will be alright.
First diagnose the cause and then start appropriate treatment.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your husband. Thanks.