<s>[INST] The dentist prescribed me to use Paroex for my sensitive teeth...but I'm finding it's changed color on my fillings that I have...from silver to black...and I'm still having sentivity teeth...what can I do ? Sorry can't afford this ? Thought I would get free advice. [/INST] Hello, thank you for sharing your problem with HCM. This paroex toothpaste contains chlorhexidine which is an effective antiseptic for gums.  It is not used for sensitive teeth. In case of sensitive teeth you can use colgate sensitive toothpaste as it is very effective for sensitive teeth. But you have to remember the procedure that you have to apply it for 10-15 minutes on the teeth and then rinse it off.Hope it will help you. </s>