A person with grey hair may notice that some or all of the hair has become darker. This may occur due to one or more conditions.


Conditions that may cause a person with grey or white hair to grow darker hair:

(1) drugs (see below)

(2) inflammation (exudative dermatosis, furuncle, etc)

(3) regrowth of hair involved in radiation-induced alopecia

(4) chronic arsenic poisoning


Drugs that rarely may cause a person with grey hair to grow darker hair::

(1) tamoxifen

(2) minoxidil

(3) carbidopa

(4) para-aminobenzoic acid

(5) verapamil


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