On the bottom of the page there are also detailed descriptions for each combination, in your case it says:
> Opioids & Benzodiazepines
> Central nervous system and/or respiratory-depressant effects may be additively or synergistically present. The two substances potentiate each other strongly and unpredictably, very rapidly leading to unconsciousness. While unconscious, vomit aspiration is a risk if not placed in the recovery position Blackouts/memory loss likely.
http://wiki.tripsit.me/wiki/Drug_combinations
On the bottom of the page there are also detailed descriptions for each combination, in your case it says:
> Opioids & Benzodiazepines
> Central nervous system and/or respiratory-depressant effects may be additively or synergistically present. The two substances potentiate each other strongly and unpredictably, very rapidly leading to unconsciousness. While unconscious, vomit aspiration is a risk if not placed in the recovery position Blackouts/memory loss likely.
> http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3454351/