Yes, these medications are safe and appropriate. Ondansetron controls vomiting, Lansoprazole reduces stomach acid to soothe throat or stomach irritation (which often causes tiny streaks of blood during forceful vomiting), and Paracetamol manages the fever. Precautions to take: 1. Keep your baby hydrated by offering frequent, very small sips of oral rehydration solution (ORS), breastmilk, or formula. 2. Follow the exact dosages prescribed by your pediatrician. 3. Monitor closely: seek immediate medical care if you notice signs of dehydration (like no wet diapers for 6 hours, dry mouth, or no tears when crying), extreme lethargy, or if the vomiting or blood worsens.