You are doing right. But each drug has side effect and reduces immunity. I sggest Indian herbs which are very effective and efficacious without any adverse effect Give KADDA. 150ml of drinking water, +3wholr black pepper ,+4 cloves,fresh crushed ginger,+jaggary Boil this conccoction to concentrate to 100ml twice a day for three days.vitamin C500mg offand onas candy. Good diet exercises and vrntillation Sun exposure good sleep and healthy emotional health is positive in helping good health. Keep happy healthy emotional healthy environment

You can give plain cetrizine syrup 3.5 ml twice a day till cold subsides