Is ramantidine used in parkinson's? i know amantidine is, and i heard that ramantidine can replace it if the amantidine was causing se like edema.

No: It is not used for Parkinson's. I did a literature search and found it only used for treatment of Influenza type A (limited by wide-spread resistance in the USA) with no indication for the extra-pyramidal symptoms of Parkinson's which IS listed for amantadine. Sorry. (BTW, the preferred spelling is rimantadine although I searched under both spellings).

Comments: No, as already answered, you cannot get benefit with "ramantidine" in Parkinson's. Amantadine can cause livedo reticularis in about 50% and other side effects can occur. You have lost little if you stop, as this is a modest adjunctive agent. Talk to your doctor about entacapone, and dopamine agonists, and at some point, consider deep brain stimulation if appropriate.