I still wonder how SSRI affects dream recall and LDing.
Due to more serotonin in the synaptic, you have short, but more "real" REM period IMO. Do SSRI affect the melatonin level? I expect they could lower the melatonin level, because less serotonin remains outside the synaptic to be metabolized into melatonin. Tell me if I am wrong. I don't know if it increases the total amount of serotonin in brain.
Another issue is acetylcholine. High levels of serotonin result in low levels of acetylcholine and vice versa. However where is it determined? If the acetylcholine level depends on the amount of serotonin in the synaptic, it will be lowered. However if the acetylcholine level depends on serotonin level outside the synaptic, it could be elevated.
Do you know anything about it? The effect of SSRI on dreams seems to be very complex. It probably works different for various people.