What is the maxium dose a day for comtan?

The dose of Comtan will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

Entacapone is always used in combination with levodopa/carbidopa (Sinemet); never alone.

The number of times a day you take the tablets depends on how often you take levodopa/carbidopa (Sinemet).

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* For oral dosage form (tablets):
o For Parkinson's disease:
+ Adults—200 mg with each levodopa/carbidopa (Sinemet) dose. Entacapone may be taken up to 8 times a day, but the total daily dose is usually not more than 1600 mg..
+ Children— Use and dose must be determined by your doctor.

http://www.drugs.com/cons/comtan.html