It is understandable to be concerned when your baby's symptoms persist. The current medications which include clarithromycin (an antibiotic), deflazacort (a steroid), levocetirizine with montelukast (for allergies), salbutamol with expectorants (for cough), and lansoprazole (for acid reflux) are quite strong. Since there has been no improvement after three weeks, continuing this heavy regimen without a review is not recommended. Prolonged use of steroids and antibiotics requires careful medical supervision. Please consult your pediatrician immediately for a thorough reassessment. Your doctor may need to re-evaluate the diagnosis and safely adjust or simplify the treatment plan to ensure your baby's recovery.