From my experience, the ability to remain lucid while dreaming doesn’t apply to states which are induced by alcohol, etc. Another lucid dreamer I know, who is very good at it and practices meditation, tried once to drink and she just got drunk.
Now, I’ll explain why.
First of all, the term “lucidity” is misleading. When you’re drunk, staying lucid mean you can continue to think and act almost efficiently. The term “lucidity” refering to LD’ing means you realize it’s a dream. Thus it’s not the same “lucidity” at all.
Now LD’ing means you’re dreaming. It’s not the case with drugs. For instance, if you are under the effect of an hallucinogenic and you suppose that the big truck you see is a dream, it may be annoying. From what I’ve heard, it is difficult to distinguish between reality and hallucination, particularly if this hallucination reproduces something common. Hence the meaning of “lucidity” which is used in dreams can’t apply here.
Finally, drugs modify your brain chemistry and I don’t think you can change this physical effect by just you willing it. But I don’t think it’s really the question cause comparing dreams and various effects of various substances or what is called “lucidity” in waking life and dream “lucidity” are both false problems in my opinion.
Important note: as it’s told in the Forum Guidelines, drugs discussions are not allowed on the forum. So if you want to discuss this, please let it very general. Please don’t speak about a precise drug by name or describe too precisely your experiences. Comments like “drugs are good/bad” will be deleted too. If I have to remove too much comments, this topic will be locked or deleted.