For acute nausea and vomiting without diarrhea, you can try over-the-counter medications like bismuth subsalicylate (Pepto-Bismol) or dimenhydrinate (Dramamine) to help settle your stomach. It is crucial to stay hydrated by taking small, frequent sips of clear fluids or oral rehydration solutions (ORS). Avoid solid foods until the vomiting stops. If your symptoms are severe, you cannot keep fluids down for over 24 hours, or you experience severe abdominal pain, please consult a doctor for prescription antiemetics like Ondansetron. If there is any chance of pregnancy, consult a healthcare provider before taking any medication.