Suboxone contains a combination of naloxone and buprenorphine. It is an opioid medication. An opioid is sometimes called a narcotic. It is a special narcotic drug that reverses the effects of other narcotic medicines. This drug is used to treat narcotic (opiates) addiction. It is not for use as a pain medication. The side effects tongue pain, insomnia, constipation, sweating, headache and swelling in arms or legs. This drug can overdose an individual that may include blurred vision, severe drowsiness, slurred speech, loss of coordination, thinking problems, weakness or limp feeling, weal or shallow breathing.