ok so I'm 31 and dont have ED but still use them just because even if i dont need it. it does help me be fully erect and maintain it. I have both the 45 mg sildenafil (viagara) blue chew and the sparks RO which is both 55 mg sildenafil and tadalafil (cialis) 22 mg. I have only used the sparks ro, and it worked fine with no side effects. I am thinking about trying the blue chew now to trial it. i have a sponsored all day and night PS date tomorrow. The blue chew is prescribed as consuming 1-2 tablets. Do i use just 1 of the blue chew to start or do i dive right into 2 tablets? in a few months when i am doing consecutive day bookings, i will probably try 1 of them a different day to compare which is more potent for me.