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Alzheimer’s dementia (AD) is increasingly being recognized as one of the most important medical and social problems in older people in industrialized and non-industrialized nations Alzheimer’s disease is characterized by the development of senile plaques and neurofibrillary tangles, which are associated with neuronal destruction, particularly in cholinergic neurons. To date, only symptomatic treatments exist for this disease, all trying to counterbalance the neurotransmitter acetyl choline degradation within synapses are the mainstay of therapy. Donepezil, rivastigmine, and galantamine are safe but have potentially bothersome cholinergic side effects. Three acetylcholinesterase inhibitors appear to be effective, currently available and have been approved for the treatment of mild to moderate AD. A further therapeutic option available for moderate to severe AD is memantine, an N-methyl-D-aspartate receptor noncompetitive antagonist. Treatments capable of stopping or at least effectively modifying the course of AD, referred to as ‘disease-modifying’ drugs, are still under extensive research. To block the progression of the disease they have to interfere with the pathogenic steps responsible for the clinical symptoms, including the deposition of extracellular amyloid β plaques and intracellular neurofibrillary tangle formation, inflammation, oxidative damage, iron deregulation and cholesterol metabolism In this review we discuss current symptomatic treatments and new potential disease- modifying therapies for AD that are currently being studied in phase I–III trials.
