Since your son's vomiting returned after taking Domstal (domperidone), it is important to have him evaluated by a pediatrician. To find the cause, the doctor might recommend an abdominal ultrasound to check his tummy, alongside simple blood or urine tests to rule out infections. Yes, headaches combined with stomach aches and vomiting can sometimes indicate childhood migraines (or abdominal migraines). Please ensure he stays hydrated with small, frequent sips of electrolyte solutions and visit his pediatrician soon for a proper physical examination and tailored guidance.

Domstal, which contains domperidone, is typically used for acid reflux or vomiting and is not effective for motion sickness. Car sickness is actually quite rare in babies under two years, and standard motion sickness medications are generally not safe for a 17-month-old without a doctor's supervision. Instead, I recommend trying drug-free steps like keeping the car cool, ensuring he looks straight ahead, and taking frequent breaks. Please consult your pediatrician before giving him any over-the-counter medications to ensure his safety.