Veins or arteries from the legs are sewn into the arteries of the heart to bring blood past a blockage and increase the blood flow to the heart. Bypass is usually done when angioplasty isn't possible or when your doctor feels that the results would be better with bypass surgery than with angioplasty. Each of the medicines prescribed for heart disease, just like most medicines, may have side effects. Aspirin may cause upset stomach. The nitrates may cause hot flushes and headaches.
Beta blockers cause fatigue and sexual dysfunction in some patients.
Calcium channel blockers may cause constipation and leg swelling. These are some of the more common side effects of these medicines. Most patients don't have side effects from these medicines. If you have side effects after taking a medicine, tell your doctor. Every medical procedure, such as angioplasty or bypass surgery, has a potential risk.