Sildenafil (Viagra) is old and busted. Tadalafil (Cyalis) has a longer duration of action and less side effects (17 vs 4 hours half life) due to a lesser reduction of PDEs besides the targeted PDE5.<p>Additionally, studies show that daily tadalafil is much better in managing or even “curing“ ED.<p>Want a little extra boost? Consume 6g of L-Citrullin a day. One of the few proven, freely and cheaply available substances that improve erections. L-Citrulline gets converted to L-Arginin and is better that L-Arginin supplementation.<p>If you want to increase the half life, consume pomegranate juice.<p>Warning, L-Citrullin and PDE5 inhibitors potentiate each other.<p>Need even more arguments? Daily PDE5 inhibitors are cardioprotective and cardioregenerative.<p>Studies used 5mg Tadalafil daily, I am on 20 -why not?<p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7261690/" rel="nofollow">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7261690/</a>