In the yime frame of you doing this, it is so safe, that this is funny to me.
Cheers.
I find it sad. I wish that users would look into the drug chemistrys, and how they work, and what could cause this to be dangerous, before wondering if it was dangerous.
None the less, to the OP, I cant see why you wouldn't be fine. I've got a bit of a benzo tolerance, scripted 2.5mg a day KPin, but I still take like 10mg + with heroin, and I'm always fine.
When mixing opiates and benzo's, the best advice I can give people to not overdose, and from personal experience, and personal deaths, I'll stand to this:
Overdose on benzo's alone is pretty hard to accomplish, you'll probably pass out before getting there.
Overdosing on opiates can be easier, if you do a shitload, stronger bag, whatever. However with opiate withdrawal, if you are with someone who is naltrexone certified (as I am, and I carry it everywhere now, just incase) then you're pretty good, or if you remember that if you can outlast the effects (awake) they will wear off and you won't "od".
Here is when the real big problems come in:
1) You take a TON of benzo's. Causing you to enter a benzo blackout, or eat more benzo's and then blackout. Or maybe you did a little bit of dope, a little benzo, and then you ate a bunch of benzo's, you see where this is going. After taking a bunch of benzo's, or benzo's + alcohol, etc, people tend to do pretty stupid things, lose their inhibitions, and "blackout" doing things they don't remember, often stupid things. Which lead a friend of mine, after eating 10 x 2mg Xanax bars to decide to go get some dope. Which she did. She didn't test it, didn't measure out a normal amount, was so fucked she shot it all. Required 3 narcan injections, and a miracle that she's still alive. Also, passing out amist this, and vomiting, can also lead to death.
2) You fall asleep, either from the benzo's, or nod out. A problem from mixing the two, often with ONE or both in a high amount. This leads the person into thinking they should go lay down for a minute, and they die in their sleep. This is why if you can just outlast the effects of the opiates, you'll be find.
I hope this made sense to you. if you have any questions, please ask. I find that understanding reasons listed above would save a lot of lives, atleast in my personal circle, if they just understood the basic concepts, and what really "kills" a person.