The use of commercial bleaching products should be avoided. Buying a random preparation whose composition and safety is not tested and excessive or incorrect use by the patient can lead to side effects such as excessive tooth sensitivity, painful gum irritation without having the desired results. Commercially available whitening toothpastes do not whiten teeth. Dentists recommend them to maintain the result after whitening treatment. However, care is required in the choice of toothpaste because some contain abrasive grains that wear away the enamel of the teeth with destructive effects on the natural dental substance. Also, some whitening products sold in pharmacies may cause you a problem, depending on the condition of your mouth, and it is advisable to consult your dentist before proceeding with such a purchase.