Due to being sero-negative, I am currently without a dx. However as my symptoms are on the rise, it was determined that I would have a trial of low dose Mestinon to see its effect. I was started on 30 mg with b'fst and with lunch, then in 2 weeks I am to take it with b'fst and supper. Both the GP and the Pharmacist told me it could take up to a month to note effect. I have taken it for 3 days thus far with no effect on muscle issues. Does this sound reasonable? It sounds as though most people claim it works immediately. Thanks