Chlorhexidine is a broad-spectrum disinfectant which is generally (but not only) used for the oral care after dental surgeries or in the case of gum inflammation; in fact, it is found in the composition of sprays, mouthwashes or toothpastes.
However, care must be taken and Do not use products that contain chlorhexidine continuously and without a prescription of the dentist, as prolonged use of this substance can cause a number of side effects:
irritation mouth
stains on the teeth
unusual or unpleasant taste in the mouth
decrease in taste sensation
It must then be remembered that chlorhexidine destroys bacteria that develop in the coating (plaque) that forms on teeth between brushing, thus preventing the onset of gingivitis; however, chlorhexidine does not prevent the formation of plaque and tartar!
So proper tooth brushing and flossing are necessary and important even when you are using a chlorhexidine product.
[Medical Director: Dr. Mauro Savio, Member of the Dentists Register Provincial Order of Surgeons and Dentists of Milan n. 4168].
English (UK) 
Italiano 
Русский