It contains cetrizine and ambroxol. both have no fixed dose. i believe not to give such drugs for minor problem. just give benadryl syrup 1tsf sos. when we say 1tsf ,it means a little more than half a tsf. every in doses is relieve symptoms. uses cautiously minmal drugs. Antiallergic are addictive in nature. I give Kadda home made !%)ml of water, add crushed piece of ginger, jaggary, 3-4n whole black peppers,2-3 cloves, and a few seeds of elachi(big size quality), boil the concoction. cool .it and feed it to your son. it is quite tasty because of jaggary. if you feel it very strong, decrease additive. feed the child 2-3 ties in a day. prepare it fresh. Relent is mixture of cetirizine and ambroxol

Syrup Relent 5ml thrice a day for 5 days.

Greetings, need to ask more history how is cough type , when it's more,  so kindly book a consultation so that I can give you the prescription .