<s>[INST] Hello Doc,I am posting this query in the midnight. I am undergoing treatment for root canal and in the last sitting the doc has just done the filling part. He has suggested me to take antbiotics like augmentin plus felxon mr for few days and then will fit the crown. I am taking the medication and today is the third day where i am having unbearable pain and not able to sleep at all. Even after having flexon and augmentin i am still having pain and the strange part is with this i was able to supress my pain for two days but in the third day its just not working with medicines also. Please help and suggest.Thanks [/INST] Hi. Welcome to Chat Doctor . I have gone through your query and can understand your concerns. As per your complaint it seems that pain after Root Canal filling that is not being relieved even after taking medication can be either due to infection below the root tips of tooth that has not yet resolved and filling is done over it leading to pain. Other reason can be that any root canal is missed accidentally from cleaning and filling and as nerves might be present in it alive leading to pain. I would suggest you to consult an Endodontist and get evaluated and an x Ray can be done to look for exact cause of this pain and treatment can be done accordingly. In case of infection removal of filling, re cleaning the canal, continue Antibiotic and painkillers and filling again once infection subsides is done. In case of missed canal, locating the canal and cleaning and filling is done. As of now take higher painkiller like TRAMADOL or Motorola to relieve pain. Hope this information helps. Thanks and regards. Chat Doctor.  </s>