I am 52 and up until few years did not have a problem coming twice in an hour punt. But lately is has become difficult to maintain the errection or recover enough to have a good second round. So me trying this was out of curiosity as well performance enhancing.
I have not tried Viagra but Super Kamagra which is in the pill. Have to yet try the jelly. What I found was the pill can be cut into halves and even quarter. The OP who was nice to sell me a pack of 4 to try suggested only using a quarter. I have so far tried almost half as I did not have a pill cutter. I had the pills at 11:30 but could only get to punt at 6 pm. I was able to have 2 good sessions. The second one was really long one. The second time the same thing but I got a pill cutter which makes a clean cut. This time I smashed away the second time and got to a stage after 10 min but did not come. This has never happened to me before. Since then I have tried quarter only which is better option for me as it does not give as much hot flushes. The first time I felt face and head getting hot.
What I also experienced is that it makes you really thirsty. So I make sure I drink lots of water. It may also help flush the body of the chemicals.