Cheap Evista online side effects may include the following: hot flashes, sweating, or leg cramps may occur. If these effects persist or worsen, notify your local doctor at once. Bear in mind that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many patients using this medication do not have serious side effects. Generic Evista medication may infrequently cause stroke or serious blood clots to form in the legs, lungs, or eyes. Solicit immediate medical attention if any of these unlikely but serious side effects occur: leg swelling/pain, trouble breathing, chest pain, sudden vision changes, severe headache, weakness on one side of the body, confusion. A severe allergic reaction to this drug is rare. Nevertheless, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.