I had the craziest, most vivid dreams when I was taking Plaquenil, but since I've stopped taking it I am back to "normal" dreams. Which really means that I'm having them but without any recollection the next day.
I've taken a lot of different abx before, including Augmentin, but none caused me to have such zany dreams as I had when taking the Plaquenil. At one point in one dream, I was riding a giant horse through an urban neighborhood, jumping over entire backyards at a time....without going into detail (it was way too detailed!), the very same dream ended with me fighting in the Viet Nam war? Don't ask. I would often say to my wife just before bed "well, I wonder where I'm going tonight."