CLICK HERE TO BUY NOW Eriacta 100mg is used to treat pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension. If you have a severe heart or liver problem. If you have recently had a stroke or a heart attack, or if you have low blood pressure.There isn't much difference between Sildenafil 100mg and 50mg, although in clinical trials, the higher dosage was seen to be 82% effective, as opposed to 74% effective. The effects of Sildenafil 100mg do not last longer than the 50mg dosage, but they tend to be stronger.