My sweet 13 month old girl just began mestinon (in an oral syrup form) today. She's had two doses of .83ml each in 8 hours, but nothing seems to be happening. The Dr. said it should take effect in 30-40 minutes. Could her dose be too low? Or was her positive diagnosis based on the Neostigmine challenge test false? She's seroneg, but results aren't in yet on the MuSK antibody test. Was so excited to have a solution to her problem, but now feeling let down. Any tips?