: There are documented instances of post-arsenical lichen planus , an inflammatory condition affecting the skin and mucous membranes. Timeline of Effects
: Development of skin lesions, cardiovascular disease, and malignancies. arsenical
: A common subacute or chronic effect is peripheral neuropathy , which causes numbness, tingling ("pins and needles"), and weakness in the extremities. Internal Complications : : There are documented instances of post-arsenical lichen