Namenda is used to treat Alzheimer's Disease, Dementia. The generic version is called Memantine hydrochloride. The average Namenda cash price is about $72.98 for a supply of Solution 10 MG/5ML 30 pcs. You can reduce your Namenda cost by up to 75% with our free Namenda discount card. Bring it to a participating pharmacy near you to save on your prescription medication.