5.  True or false, the reports of so-called transient radicular irritation (now referred to as "transient neurologic syndrome") following spinal anesthesia PROVES that certain local anesthetics are neurotoxic?

Answer: False

The cause of transient radicular irritation is unknown.  It is likely a mild toxicity that resolves or ceases to be clinically apparent within a few days.  However, until the real cause of transient radicular irritation becomes known, its existence does not prove that certain local anesthetics are neurotoxic.

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