hi dear, black color stool is coz of the iron supplement that you have been taking constipation
is one of complication of long term use of iron, you must be staring a lot pressure while defecation that might lead to a tear in anal region and some blood may appear. in this case i would advice you to stop iron for some time, repeat your test iron profile, if its normal you can leave medication, also reff your physician and ask him what is the cause for Anemia
. for peripheral neuropathy
you can start taking pregabalin
i hope you got your answer.
thanks for writing .