How long do you hold pyridostigmine prior to EMG / nerve conduction study in patients with suspected myasthenia?
Answer from: at Academic Institution
At least 12 hours prior to repetitive stimulation or SFEMG, per AANEM practice parameter. In our lab we recommend 24 hours if possible. Geiger and Katirji, Myasthenia Gravis and Related Disorders pp 131–152