SIDE EFFECTS: Nausea, dizziness, drowsiness,
trouble sleeping, constipation, unusual weakness, stomach upset and pain, headache or dry mouth may occur. If these effects persist or worsen, notify your doctor promptly. To relieve dry mouth, suck on (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water or use saliva substitute. Report promptly any of these serious side effects: hallucinations, difficulty moving or walking, trouble breathing. Unlikely but report promptly any of these effects: twitching, confusion, fainting, leg/foot swelling, restlessness, chest pain, unusually fast/slow heartbeat, sudden irresistible urge to sleep. Very unlikely but report promptly any: muscle pain, vision problems, fever, severe muscle stiffness. If you notice other effects not listed above, contact your doctor or pharmacist.
http://www.medicinenet.com/pramipexole-oral/article.htm