Hello thanks for consulting at hcm.. LOT of causes for excess saliva such as a new denture, stomatitis, infection of mouth/throat,,also due to allergies,, Even salivary calculi in the salivary duct also causes pooling of saliva,, so get a occlusal radiograph and ultrasound examination if this is the case.. Atropine medicine will usually dry up the secretions, but whether required for you has to be evaluated by your general physician,, IF it is caused by allergies, first you have to find due to which allergen, so kindly consult a allergy specialist and followed by a oral physican for a check up and treatment,,, Hope it helps,,take care..