My Husband Started Vomiting At 11 Am Today. Here Are

My husband started vomiting at 11 am today. Here are details: no fever. Empty stomach. Ate before 11 pm last night. No chills. Achy. Feet are slightly swollen. Stomach discomfort. Bad headache for several days. Tylenol not helping it. He was taken off Lisinispril with a diuretic recently and put on plain Lisinispril. Vomiting went from vomiting up spit to vomiting up green bile. He is able to urinate normally. He just drank a 6 ounce glass of water. It stayed down. Asleep now. Do you think it is flu or should I take him to an immediate care facility?