What medication is used as treatment for alzheimer's disease?

Several: Early on, a medical food such as axona or cerefolin-nac may be useful. Later on, donepezil, rivastigmine, or galantamine (galantamine hydrobromide) can help. Memantine especially in combination with one of the acetylcholinesterase inhibitors seems very helpful. Current meds are only modestly successful, and we hope to see newer agents soon, such as bapineuzamab, and even ivig.

Four: Three of them are inhibitors of acetylcholine breakdown (aricept, Exelon (rivastigmine) and razadyne) and one is affecting glutamate receptors (namenda).

Acetylcholinesterase inhibitors like donepezil increase acetylcholine, memantine, an NMDA receptor antagonist reduces the neurotransmitter glutamate which has damaging effects on the neurons in Alzheimer disease, and monoclonal antibody therapies directed at reducing amyloid stores in the brain, example aducanumab