<s>[INST] a FRIEND RECENTLY HAD A ROOT CANAL DUE TO AN ABCESSED TOOTH. sEVERE NAUSEA AND DIZZINESS HAVE PLAGUED HER FOR THE PAST 3 WEEKS. A BOUT OF ANTIBIOTICS AFTER THE FACT , AFTER BEING HOSPITILIZED, AND NOW AGAIN IN THE HOSPITAL DUE TO THE SAME WITH A FEVER. NO ANSWERS FROM THE HOSPITAL DOCTORS AND TESTS. HELP! [/INST] Thanks for your query.  I have gone through your query. As far as the nausea and dizziness after root canal treatment is concerned, it can be secondary to the adverse effects of the antibiotics resulting in gastritis. This might cause nausea and dizziness. Nothing to be panic consult a good general physician and get it evaluated. Meanwhile you can take antacids like ran tidiness and anti emetics like risperidone.  Do not eat spicy food. Consume a lot of liquids. I hope my answer will help you. Take care. </s>