Yeah, minimum 2 hours after the last meal before I take the V. It varies from person to person, and depends on what you ate. Like for me, if I had a heavy fatty meal like Betty's burgers, I would have to wait at least 4 hours before I could take the V or even have sex. I'd be all bloated and feel uncomfortable.
Anyway, if I do everything right and take the V on a truly empty stomach, it kicks in within 30 mins and holy hell, it packs a punch. Rock solid boner. I'm like a water diviner with my stick in front of me going to my punt, lol!