I tried all of the sample packs,(I am a once a week kind of user)the 2.5mg doesn't even hit, then I tried the 5s & it takes anywhere from 30min(all day, calm down & let's go ) to 3hrs later(sexy time & at night) they slapped for abt 15min, by the way, no sexy feeling from sexy time at all, then I was sober again. Very disappointing, waste of money in my opinion. I've had better from other online distributors.