actually it's easier to lucid dream without drugs, since regular use of weed/hash makes you "unaware" that you're dreaming when sleeping.
But back in a period I was smoking less I had some lucid dreams, not really knowing what it was ^^ I understood it was lucid dreaming when I read about a few months ago.
Like for I didn't know I was IN a dream, but like I could fly, I was learning to fly by myself and it felt so realistic, taking off centimeters by centimeters, but at the same time I knew it was impossible, and therefore a dream.