Sunburn

• People taking Fosamax may experience an increased sensitivity to sunlight. According to Drugs.com, sunburns may occur more quickly and may be more severe in patients taking Fosamax.
  
  

Dizziness

• Dizziness, tiredness and a feeling of overall malaise are side effects of Fosamax that may occur at the beginning of treatment.
  
  

Digestive

• Digestive side effects of Fosamax include changes in taste perception, nausea, loss of appetite and vomiting. These effects may be worse in people taking pain relievers.
  
  

Pain

• Pain in the muscles, joints and bones is a common side effect of taking Fosamax.
  
  

Swelling

• Swelling in the face, neck, hands, legs or joints is a serious side effect of Fosamax. People experiencing these effects should seek medical care.
  
  

Allergic reaction

• Although not common, Fosamax may cause allergic reactions. Drugs.com says symptoms of allergic reactions include hives, trouble breathing or swallowing, itching, skin rashes and chest pain.
  
  

Bleeding

• People taking Fosamax who vomit, cough up blood or have bloody diarrhea should seek emergency medical treatment.