Symptoms of a buprenorphine overdose can include respiratory depression, miosis and central nervous system depression. 16-32 mg dose ranges are considered “high” doses, but buprenorphine overdose is mainly related to injection. More on buprenorphine OD risks here.
What are the effects of mixing buprenorphine and alcohol? Can you overdose or die? Mixing buprenorphine with alcohol and its possible harms here.