Welcome to HCM.
Those drugs you are taking has a side effect of dry mouth
and dry nose so it is not a curetive treatment.
Cause of excessive salivation
are Neurological disease,Oral infection,Oral inflamation,Certain drug induce,Anatomical abnomality.
First you try to find out the cause of ex.salivation for this you can consult ENT specialist
Avoid any stress
if you have.Eat healthy food,think positve,do pranayam regularly.
Best wishes for recovery.