A healthy patient (no GERD) sees the needle before local anesthetic administration, begins screaming, and quickly becomes pale and unwell. What is the most appropriate management?

This presentation (fear/needle-phobia triggered, pallor, feeling unwell) is a classic vasovagal syncope/pre-syncope reaction. The correct management is to position the patient supine with the legs/feet elevated, which improves venous return and cerebral blood flow — a semi-supine position is insufficient, and giving glucose is the management for hypoglycemia, not vasovagal syncope.