An FDA endorsed medication that enables men to get firm and stay erect for close to 4 hours during sexual intercourse is Caverta Tablets. It has been prepared with a vital component called Sildenafil Citrate which offers an unhindered supply of blood to the penis for a strong and rock solid erection. This medication stays vibrant for close to 4 hours after ingestion and offers sufficient time to males for multiple sex sessions. ED patients can buy Caverta Tablets online without a doctor’s prescription from the website of a registered drug supplier in the UK.