Do dentists usually give you laughing gas for a root canal? what's it like?

Sometimes: Some dentists and patients feel that the use of nitrous oxide (laughing gas) help the patients deal with the stress or anxiety of many dental procedures. It is also an analgesic (helps the patient feel less pain during the procedure). Many patients report that nitrous oxide makes them feel like they have a "light buzz".

No: Really no need and can produce bad results in treatment results.