Toxic neuropathy refers to a form of peripheral neuropathy that can occur as the result of exposure to harmful chemicals or certain medications. For example, both lead and mercury poisoning can lead to this type of neuropathy. The peripheral neuropathy symptoms that occur as a result of poisoning from either lead or mercury, typically develops gradually over time.

In addition, many medications can cause peripheral neuropathy as a potential side effect. This includes some medications such as Isoniazid which is used to treat tuberculosis, and Metronidazole which is an antibiotic.

Many of the medications used for the treatment of HIV can result in peripheral neuropathy as well. When the exposure to either the chemical or the offending drug is stopped, the neuropathic symptoms usually will improve.

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