nutmeg is hit or miss for most people. it's like a cross between a deleriant and weed. I eat nutmeg twice a year usually, after thanksgiving and christmas, since I have extra after holiday cooking.
I get a good, loopy weed high from about 6 hours after digestion until about 20 hours, and lingering dry mouth and dizziness until about 36 hours.
A 'rule of thumb' for dosage is .75 to 1.25 grams per 10 lb of body weight. Keep in mind high doses and chronic use is bad for your liver, and extremely high doses can be fatal.
I don't know how many of you have experience with deleriants, but nutmeg won't normally give you full insanity like the rest. The dry mouth and dizziness is the main deleriant "feel" to nutmeg, as well as occasionally inflicting waking dreams... Where you become so engrossed in thought, you can actually interact very deeply with an enviroment completely in your mind.
Your experience will vary. I don't reccomend nutmeg. Most people will just feel shitty from it.