With that said, each Chiropractor will have a slightly different "style" of adjusting the spine. Be sure to check into online reviews of the office you choose. You may even want to check the website to familiarize yourself with the type of cases the doctor typically handles. I believe you would be pleasantly surprised how gentle- and effective- Chiropractic adjustments can be.
The best treatment for sciatica can only be determined once your doctor has determined the underlying cause for sciatic nerve irritation. Generally speaking, there are three main anatomical structures known to cause sciatic nerve involvement: bone, muscle and disc. There are others, but these are the most common.
I would recommend starting with an examination by your local Chiropractor to determine if your case could benefit. Often times Chiropractic is gently, quick and effective for Sciatica.
Best of luck to you in your endeavors.