You may experience
dizziness, lightheadedness, drowsiness, tiredness, diarrhea, unusual dreams, trouble sleeping, dry eyes, or vision problems as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. This drug may reduce blood flow to your hands and feet, causing them to feel cold (I believe this is a side effect for me). Smoking may worsen this effect (don't smoke).