Cold cough flu herbal remedy

My son had got cold, he ate Dcold english medicine for that after getting relief in two days and he forgot about it, But it appear again and again ate d cold next day I made a medicine he drank it 2 cups of it and got relief.
My medicine that I have prepared for him
Clove 2 ,
elaichi 2,
cinnamon 2 small 1 cm,
ajwain 1pinch,
 jeera 3pinch(3 finger pinch),
Methi 6,
black pepper 3
Crush all these and boil in 3litre water and sim for 15 minutes covered . Store in flask, For to keep more than 1 day keep in fridge after cooling.
Drink this water 1 glass 4 times in a day, after meal, Don't drink in empty stomach. As it is very hot to the body,very strong and digestive, remove all mucus in lungs and clear respiratory tract.
For children dilute again 1-2 litre water to this and boil.
Very good for all kind of cold related allergies like that sinus, ear problems, itching in ear, eye problems, nose, throat, chest all related to cough and mucus. Also good for loose motions, indigestion and stomach problems.
The best ever good medicine for all diseases related to mucus and indigestion, and good for winter and rainy season diseases.