It might be worth a try, but if all the chiropractor does is tweak your spine and does not provide any other therapy or exercises to do at home to improve the problem, then they are to be avoided. If they start talking about your spine being out of alignment or, worse, subluxations run away, as fast you can, unless it is visible on an x-ray.GO and see a chiropractor about the sciatica...you can throw the pain pills away (unless you're addicted to the codeine)
Rather visit a good physiotherapist.