Polyneuropathies caused by drugs

1. Big picture

Drug-induced polyneuropathy is an acquired toxic polyneuropathy caused by medications that damage peripheral nerves. In the exam, it belongs to the broader group of subacute sensory or sensorimotor polyneuropathies, together with toxic chemicals, vitamin deficiencies, uremia, vasculitis, sarcoidosis, and critical illness polyneuropathy.

The most important idea is simple:

A patient develops distal, symmetric numbness, burning pain, tingling, reduced ankle reflexes, and sometimes weakness after starting or accumulating a neurotoxic drug.

The lecture specifically lists vincristine, isoniazid, and nitrofurantoin as drug causes. For clinical practice and oral