You will likely feel no difference when transitioning from buprenorphine-monotherapy (Subutex) to buprenorphine/naloxone (Suboxone). Your medical provider will simply replace the dose of Subutex with Suboxone (containing the same amount of buprenorphine).
So, why no difference? Naloxone is not absorbed into your bloodstream when taken as prescribed (sublingually). Naloxone is included in Suboxone to prevent patients from injecting or inhaling it, and thus, you’ll only notice a difference in buprenorphine-monotherapy (Subutex) and buprenorphine/naloxone (Suboxone) if you’re using it improperly.