I am naughty and had 3 teaspoons of castor oil in a glass of coke at 11:15am. I read it takes about 3 hours, just wanted to be sure. I am not getting any laxative symptoms from it as of yet other than after drinking it my tummy was making all these guzzling sounds. I am a strong gutted person and I think there is still a teaspoon of the oil still sitting in the bottom of the glass so I might take another teaspoon after I get confirmation of how long it takes to work....Not game to try anymore than the recommended though because it seems that is when you run into trouble.