EXELON (not Elexon, they're a power company LOL)
According to my trusty "Drug Book", Exelon is also known as Rivastigmine. It's is a 'pseudo-irreversible' selective cholinesterase inhibitor used for mild to moderate AD or Parkinson's disease.
Exelon improves the function of nerve cells in the brain. It works by preventing the breakdown of a chemical called acetylcholine which people with dementia usually have lower levels of which is important for the processes of memory, thinking, and reasoning.
Adverse Effects can be: Nausea, vomitig, anorexia, diarrhoea, abdominal pain, headache, dizziness, somnolence, fatigue, astheria,malais, tremor, agitation, conusion, increased sweating, gastric/duodenal ulcers.
There are lots of cautions to be considered: severe liver/kidney disease, sick sinus syndrome or supraventricular cardiac conduction disorders, gastric ulcers or obsructive lung disease (COAD/COPD), can be mildly irritating to skin, eye and mucous membranes due to containing sodium bezoate.
Memantine (also known as Ebixa which I have previouly written about in other posts) Is basically the same but with less cautions to be considered. If you do a search of healthboard posts, you will find the thread containing the information.