I avoided any meds for my PN until I couldn't. My Dr. recommended the maximum dosage of 2600mg beginning with 800mg daily and adding 100mg each week (currently at 1300mg daily). Is it helping?…perhaps but still have tingling, numbness sensations and now getting routine severe cramps aka "sledge hammer" on calves at night. Reading the anecdotes from others, it seems that a much lower dosage is the norm. My question is, why did my dr. advise max dosage given my symptoms are: numbness, tingling, cramps etc. progressing up my calves at present?