Thanks for the query.
If you are sure, its only a post nasal drip
issue, then it will respond dramatically to steam inhalation. Buy a vaporizer available in any pharmacy, add plain water and make her inhale the steam thrice a day and definitely before bedtime. It will liquefy the secretions in the sinuses
and clear the drip significantly. Use the otrivin
spray at bedtime after steam inhalation before she sleeps. The barking cough is due to some laryngitis
which will recover with voice rest and steam inhalation.
Keep off cold food items till recovery. Vacuum the bed she sleeps on, the curtains in the house and also all the sofas, carpets, etc. Use double pillow case. This will reduce the allergy
By following the above steps, Im sure your child will be on the road to recovery very soon.