Dyskinesia; GI symptoms; urine discoloration; fatigue, insomnia, paroneiria, confusion, hallucinations; dizziness, postural hypotension, vertigo, headache; leg cramps, hyperkinesia, tremor, increased sweating; slight decrease in Hb, erythrocyte count & hematocrit. Increases in liver enzymes (rare). NMS, especially following abrupt reduction/discontinuation of entacapone, & rhabdomyolysis (isolated cases).