I took Fosamax for three months. At 2 1/2 months, I experienced muscle, jaw and joint pain to the point that I could barely walk. Up until then I was swimming 3 times/week, 45 minutes (nonstop) at a time. The onset was sudden and dramatic and happened after a swimming session when I was walking across the parking lot. My legs turned to jelly and I barely made it my car. Since then, I've had excruciating pain in my arms, hips, back and shoulders. It seems like every injury I've ever had was reignited. I was admitted to the hospital where they run multiple tests, but found nothing that was causing these symptoms, I've also had severe vertigo, though unsure if this is Fosamax-related.