• More common side effects may include:
Abdominal cramps or discomfort, confusion, constipation, depression, diarrhea, dizziness, drop in blood pressure, drowsiness, dry mouth, fainting, fatigue, hallucinations (particularly in Parkinson's patients), headache, inability to sleep, indigestion, light-headedness, loss of appetite, loss of coordination, nasal congestion, nausea, shortness of breath, uncontrolled body movement, vertigo, visual disturbance, vomiting, weakness
• Less common side effects may include:
Abdominal bleeding, anxiety, difficulty swallowing, frequent urination, heart attack, inability to hold urine, inability to urinate, nightmares, nervousness, rash, seizures, splotchy skin, stroke, swelling in feet and ankles, twitching of eyelids
Some of the above side effects are also symptoms of Parkinson's disease.
• Rare side effects may include:
Abnormal heart rhythm, blurred vision or temporary blindness, cold feet, fast or slow heartbeat, hair loss, heavy-headedness, increase in blood pressure, lower back pain, muscle cramps, muscle cramps in feet and legs, numbness, pale face, paranoia, prickling or tingling, reduced tolerance to cold, severe or continuous headache, shortness of breath, sluggishness, tingling of ears or fingers