I take Zolpidem about every other day - it gives me 6 hours of sleep. Falling asleep on it is sudden and effortless like turning off a light switch and I never remember the moment of falling asleep, nor I remember any dreams on Zolpidem. Obviously it impacts memory formation while the drug is active during the night. However, my memory formation during the day when the drug concentration falls to negligible levels is not affected.
On days when I don't take Zolpidem, I have trouble falling asleep and the night is broken into a sequence of several disconnected dreams with waking up in between. I also do not seem to fall into a very deep dreaming, my logical sense remains turned on during the dream and I am able to evaluate the dream and often direct it in the way I want - something untypical for a real dreaming state.
On days when I don't take Zolpidem, I have trouble falling asleep and the night is broken into a sequence of several disconnected dreams with waking up in between. I also do not seem to fall into a very deep dreaming, my logical sense remains turned on during the dream and I am able to evaluate the dream and often direct it in the way I want - something untypical for a real dreaming state.