Are there any bad side effects of fosamax (alendronate)?

Yes: Bad side effects are uncommon. If you are high risk for a fracture, benefits far outweigh theside effects. The bad side effects include a 1 in 1000-5000 chance of getting a hip fracture in the middle of the thigh bone(femur.) there is also and increase in osteonecrosis of the jaw bone (death of the bone) especially in those who have poor dental hygiene or who have dental surgery taking fosamax (alendronate).

Fosamax (alendronate) side effects: Potential for esophageal erosion or ulceration - so should be taken with a full glass if water and no lying down for 30 minutes after taking the pill. Also potential for some atypical fracture in the femur with prolonged use. Most recommend a rest from the medication if on it more than 2 continuous years.