www.Rxlist.com - has this, under Lyrica side effects:
http://fdb.rxlist.com/drugs/drug-939...me=Lyrica+Oral

Drowsiness, dizziness, confusion, difficulty concentrating, unsteadiness, fatigue, swollen arms/legs, increased appetite, weight gain, nausea, dry mouth or constipation may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

What it doesn't say, is that these symptoms may occur- initially,
but usually subside and cease, after anywhere from 1-4 weeks.
Dependant on severity - stopping too soon could be that you don't give the med a chance to work - or do not increase dosages to achieve optimum results.
Titration should be in 50 mg increments with a schedule of increases every 4-8 days dependant on your ability to 'level' off with the s/e. Not until 300-450 mgs/day are achieved do most of us have positive results. I am at 600 mgs day in 3 divided doses. Three doses/day, rather than 2- are optimum.
Once your system is used to the med 24/7, it can be of sinificant value in treatment of neuropathic symptoms. Combined along with a pain med, like Tramadol (and others) - best results can be achieved.