I bought 100mg and first tried taking 25mg divided into 4. I took it at 10pm, and by 11pm I was able to respond with just a little stimulation. In the morning, I couldn't hold it in and masturbated, but it was harder to cum than usual, and I felt more confident because it lasted longer. Even after ejaculation, I remained erect for a while without going limp. It was already 6am, so I calmed down after that. During the act, when my excitement increased, I felt a slight headache. At least it seemed to suit me, but I wondered what would happen if I increased the amount? I was mixed with hope and anxiety, but in any case, I was happy to feel like I had regained the energy I had when I was young. I will be careful about the time and day of the week (off) when I use it. There were other medicines on the site, so I would like to try various things. It's not cheap at all, but I'll consult with my wallet just in case (lol)