Multiple choice

The role of sodium bisulphate in a local anesthetic solution is ____________.

  1. antioxidant

  2. aesthetic agent

  3. vasoconstrictor

  4. preservative
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A is the answer of choice. All standard local anaesthetics contain the preservative sodium bisulphate or metabisulphite. The preservative is necessary to keep the epinephrine fresh (epinephrine quickly deteriorates and loses potency otherwise).

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