I've been on Fosamax for 8 months for AVN and osteoarthritis. I've had bad rashes on my face over the past few months, intermittently and took my weekly tablet this morning. Two hours later, I'm covered in rash over my forehead and around eyes. Haven't done anything else that might have set it off. A bit slow but I suddenly thought, could it be the alendronate. Looked it up and it said a rare side effect. Has anyone else experienced anything similar? Lisa.