My wife takes Venlafaxine to control panic disorder. She had been on Paxil until it was discovered that Paxil interfered with Tamoxifen she was taking following breast cancer.
She regularly has vivid dreams which will cause her to yell out and talk iun her sleep. She will also appear to move her legs rhythmically like she's running. If I wake her up, she'll describe a not so pleasant dream of someone chasing her or something along those lines. I've heard her speak so clearly, that I've thought she was talking to me. Other times it's unintelligible.
Whatever you do, DO NOT stop Vanlafaxine (Effexor) without consulting with your physician! We had a scare this past winter when my wife got ill with the flu and was unable to hold anything down, so stopped all her medication for several days. By day three her Venlafaxine withdrawals were so severe that we thought it was her illness recurring. I forced her to begin the Venlafaxine a little at time until she had taken her full dose within a couple of hours. Later in the evening, she was sitting up and having some soup. By the next morning, she was up and feeling much better. There are horror stories from people stopping or trying to get off of it, so use extreme caution. There is a liquid form of Venlafaxine available for people who are weening off of it so the dose can be reduced slower than cutting a pill in half or quartered.
It's an effective drug for what it does, but the side effect of ceasing it are severe.