1. Cholinergic activators:
Tacrine
Rivastigmine
Donepezil
Galantamine
2. Glutamate (NMDA) antagonist:
Memantine
3. Miscellaneous cerebroactive drugs:
Piracetam
Pyritinol (Pyrithioxine)
Dihydroergotoxine (Codergocrine)
Piribedil
Ginkgo biloba
Citicoline