For Bob Garrick: Bob, Your looking for "Lodosyn" that is carbidopa to be taken with Sinemet to help control nausea is confusing to me. Sinemet IS carbidopa and larodopa miixed together. For example; 25/100 sinemet refers to 25 mg of carbidopa and 100 mg of larodopa mixed together. Carbidopa is, for some people, a real problem. I took nothing but larodopa for some years because of my intolerance to carbidopa. The problem went away when Sinemet CR came along. If you take this " Lodosyn" for additional carbidopa (I've never heard of this drug), you could well be overdoing the carbidopa. I am surprised that your doctor did not know all this. I suggest (1) that you might want to try Sinmet CR on a trial basis; (2) Seek another opinion - or a new doctor; and (3) Read "Parkinson's Disease: The Mystery, the Search and the Promise", Pixel Press, that can be ordered by calling..1-800-444-2524, to get the full true story of the use and development of Parkinson's Disease drugs and procedures. I won't use up 9 list pages by quoting the drug section of the book .....but I think you will find it worth reading. Hope this helps. [log in to unmask]