Please do not give your baby any over-the-counter anti-vomiting medications, as they are not safe for infants. Frequent vomiting while still acting hungry can indicate acid reflux (GERD), a feeding sensitivity, or occasionally a physical blockage. To help, try giving smaller, more frequent feeds and keep him upright for 20 to 30 minutes afterward. Watch closely for signs of dehydration, such as having fewer than six wet diapers a day, dry mouth, or unusual lethargy. Please consult your pediatrician promptly to get an accurate diagnosis and safe treatment plan.