how long do i have to wait since my last heroine injection before i may take my first suboxone dose? Also, what is minimal required dosage for the first couple of days, keeping in mind my 25years of opium, heroine, methadone constant abuse..? It was at least 16 hrs. or more since my last fix, is that enough time to take suboxone 2mg - 0,5mg sublingual tablet now?