Dimebom is a new pharmaceutical treatment alternative for patients suffering from Alzheimer’s Disease. Dimebon is an older medication that has recently been discovered to be most helpful in treating patients with Alzheimer’s Disease . Dimebon ( the actual drug is known chemically as Dimebolin) is an older Russian antihistamine drug. It was popularly used in Russia as an antihistamine for hayfever , allergies and the like. In fact the drug was sold as an easy to obtain antihistamine - sold over the counter without a prescription.