Lyrica is a very long acting drug.
In terms of effect, i'd say 5-7hrs + from immediate intoxication you'll be feeling fairly legless - some strange spacial perception (not unlike ketamine), alot of euphoria to go with it, which is unlike most k trips.
1 of 2 things will happen, personally first dose try for 350-500mg dose range for optimal effect.
1st = you'll just pass out. This happened for me the first time i took a 'rec' dose of lyrica. You begin feeling real good, next minute you wake up and 7hrs have flown by.
2 - you'll get the K like buzz i described above.
Alright now im itching for some Lyrica.