Cholinergics are agents which affect the components of the nervous system which use acetylcholine, which is a facilitator of the formation of memory.
Regular Websites
This is the official web site of Mestinon, which makes this agent. The manufacturer lays out the pharmacology of pyridostigmine bromide, its uses, dosage details and contraindications. - Mestinon
http://www.mestinon.com/
Discusses neostigmine methylsulfate, including the pharmacology, indications and contraindications as well as possible side effects. - RxList: Neostigmine
http://www.rxlist.com/neostigmine-drug.htm
The National Institutes of Health publishes this site, which has a section devoted to the test for diagnosis of myasthenia gravis. - Tensilon Test
http://www.nlm.nih.gov/medlineplus/ency/article/003930.htm