I ask the same question,my hair has thinned out,but, I believe it is from B.P.Meds. and hydralazine is listed as a cause of P.N.,but I got mine from 2 years of antibiotics for an undiagnosed MRSA infection and I seen a old program that mentioned a guy having all my symptoms from either a MRI or Cat-scan ,I had both during my time and they said it spread the MRSA through out his body,he had to have his blood cleansed in hospital for 2 yr.s! I do not remember him burning like me,I burn all over and hydralazine makes it worse! I' m beginning to think the spironolactone is doing the same thing!