Glipizide
"I've had Type II diabetes. My doctor recently put me on Watson 461 Glipizide  ER. Glucose levels came back under control. After this the pharmacy switched me to a "normal" release form. I experienced terribly shoulder aches which woke me up in the middle of the night. I thought these were due to a visit to the gym, but I have been doing exercise for the past 3 years without pain this bad. It took me a while to realize this is what happened when a previous doctor also put me on Glipizide, which resulted in the same excruciating shoulder pain. I've stopped using the medication, and the pain has decreased significantly (I am not woken at night with the excruciating pain any more, pain is still there in the background). Blurry vision too."