Mixing CNS depressants is an incredibly dangerous practice and the combination of opiates and benzos (specifically alprazolam) is responsible for a shit load of OD's. Please don't get into the habit of doing this... or do it at all for that matter. Tolerance or no tolerance it's asking for trouble.
Also, we don't use SWIM or my dog, or whatever the hell... Just use "I". So please edit your post. Read the BLUA for more information on the proper way to post here.