Keep an eye on your bathroom scale if that is a concern for you. Lyrica will often cause weight gain and in some people it adversely affects their attitude making them grouchy and short-tempered. Those around you will notice if you develop a "NICE" personality suddenly, and you'll notice if you're one of the lucky ones that gains weight from taking it. It will happen quickly if it's going to happen. Helps some people, does nothing for the next person just like lots of medications.
I am not a dr. My statements are based on years of experience and related education. Consult with the professional of your choice regarding matters of concern.