Starting taking Metoprolol for tachycardia (150MG bid) Could not stay awake. It was reduced to 100 MG and now 50MG. About 7-8 hours after taking the evening dose of 25MG after dinner I start non-stop talking in my sleep. This lasts for about 3 hours. I do not hear myself talking, do not remember anything I say. This is driving my wife crazy, out of our bed, and into the guest room, Also now have developed white spots on my tongue, and increasing urinary incontinence.