i have been in a lot of severe pain with my lower back since september?
for the present symptoms of pars interarticularis along with medication you should also apply ice for a period of about 15 minutes 3-4 times a day and followed by stretching exercises. a brace can also be used to relieve pain and improve symptoms. take a rest of 3-4 weeks time. in case if nothing still works then unfortunately surgery is the only option. hope this helps