Virekta Extra was developed over a period of three years and it is designed to work quickly, remain active in the body for at least 36 hours and to give you a strong erection with few, if any side effects. All the herbs used were clinically analysed for their quality, including their freshness and potency. All of the herbs used have very long histories of helping men to overcome erectile dysfunction. Only standardised herbal extracts of the highest potencies were used so as to ensure the same quality and power in every capsule. The following potent herbs are in each Virekta Extra capsule: tribulus terrestris; maca; red ginseng; fenugreek; saffron; ginkgo biloba and L-citrulline. Take one capsule with a glass of water one hour before sexual activity and do not take more than one capsule in any 24 hour period.