osteoporosis
"MD prescribed Fosamax. Took first dose and two day later woke up with a severe headache, boating, gas and terrible nausea. By the time I got home from work I had severe back pain, joint pain and headache. The boating was almost intolerable. The next day, nausea was  worse and the headache continued with no relief even after OTC pain med. I will take Calcium and Vitamin D instead."