Moreover both use the same enzymatic pathways. In other words, it isn't a case of disparate substances.
To the poster who is an alcoholic who used the combination with no ill effects...Subjective experience holds absolutely no value. Your personal usage simply means that you were lucky, if it is as accurate as you maintain. It is like randomly using dirty syringes for 20 years and then stating, "I used dirty syringes for 20 years with no ill effect! Dirty needles don't cause HIV/AIDs!" Harm Reduction is about minimising harm. With that in mind, should you ever get a hankering to use again, do your body a favour and research the issue.
Another example, as a post script, is my dosage of 360 mgs of morphine. It could kill 10 non-using adults but barely has a physical effect on me. Should I state, "360 mgd of morphine is safe because I haven't been killed by it?" Just some thoughts...Though you did provide corroboration for my explanation about why I stopped posting in drugs forums hahaha.