My daughter is 4 months 25 days old.. she is drooling and chewing on fingers .. being irritated all the time.. can i start with calcarea phosphorica?

A. Teether also you can give this age it’s a very good option and yes the medicine that you are mentioning is going to be good to be given to the child which you can easily give 3 to 4 times in the day and you can continue with it for the time being and this is going to help in easing the process