This site will look much better in a browser that supports web standards, but it is accessible to any browser or Internet device.
If you successfully grapple your victim you will put them to sleep for a duration of up to 1/2 of your strength (in hours). It will also slow their regeneration and delay you for 5 rounds. You can only use grapple during solo combat (i.e. it's just you and your victim fighting). The delay is 3 rounds on failure. If the victim is 5 sizes smaller or larger than you then you have a higher chance of failure (the small ones slip out, the big ones are hard to get a good grip on).
See also: Poison