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It is best that he does steam inhalation for relief. Keep away from cold
food and liquids. Eat plenty of fresh fruits and green leafy vegetables. Drink plenty of water. If he is having yellowish nasal secretions he can take T.Levofloxacin
500mg once a day for 5 days and also T.Cetrizine
at night to reduce the secretions. If this does not cure it he can consult his Doctor for relief.