chronic pain
"Morphine Sulfate ER 15 mg.
I have been using this for approximately 6 months. I find that many of the side effects listed have become apparent to me. 
I do experience: shakiness, constipation, elevated liver enzymes, difficulty urinating, uncontrollable sleepiness, blurred vision, sensitivity to bright lights at nighttime, including some indoor lighting. In addition, I suffer from stomach pain, feel lethargic at times, memory loss, lack of desire to socialize, depression, and other minor events that I did not have prior to taking morphine."