Alendronate is used to prevent and treat certain types of bone loss (osteoporosis) in adults. Alendronate belongs to a class of drugs called bisphosphonates.
SIDE EFFECTS: Stomach pain, constipation, diarrhea, gas, or nausea may occur. Tell your doctor right away if you have any serious side effects, including: jaw pain, increased or severe bone/joint/muscle pain, new or unusual hip/thigh/groin pain, swelling of joints/hands/ankles/feet, black/tarry stools, vomit that looks like coffee grounds. This medication may infrequently cause serious irritation and ulcers of the esophagus. If you notice any of the following unlikely but very serious side effects, stop taking alendronate and talk to your doctor or pharmacist right away: new or worsening heartburn, chest pain, pain or difficulty when swallowing. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), dizziness, trouble breathing.