Patients with heart problems who take Viagra may be at increased risk for heart-related side effects, including heart attack or stroke. <a href="http://www.viagrabelgiquefr.com/viagra-dose" rel="nofollow" target="_blank"><a href="http://www.viagrabelgiquefr.com/viagra-dose" rel="nofollow" target="_blank">http://www.viagrabelgiquefr.com/viagra-dose</a></a>