Premedication Before Anesthesia for Elective Surgery

Anxiolytic Premedication

• The American Geriatrics Society recommends avoiding benzodiazepines in elderly patients (≥65 years) due to increased risk of cognitive impairment, delirium, and falls 1, 2, 3
• Preoperative education and structured patient information programs should be the first-line approach to reduce anxiety rather than pharmacologic anxiolysis 2, 3
• Melatonin provides effective preoperative anxiolysis with few side effects compared to placebo and is equally effective to midazolam with high-grade quality evidence 2, 3

Multimodal Analgesic Premedication

• The American College of Surgeons does not recommend preoperative gabapentinoids for routine use in elective surgery due to increased postoperative sedation, dizziness, and visual disturbances 1, 4
• Preoperative acetaminophen should be dose-adjusted according to extent of resection 1, 4

Antiemetic Premedication

• The American Society of Anesthesiologists recommends against routine preoperative use of antiemetics to reduce pulmonary aspiration risks in patients without apparent increased risk 5
• Preoperative hyoscine (scopolamine) patches can be used in patients with high risk for postoperative nausea and vomiting but should be avoided in the elderly 1, 4

Preoperative Fasting Guidelines

• The American Society of Anesthesiologists recommends clear liquids 2 hours before anesthesia and solids and light meals 6 hours before anesthesia 1, 4, 5
• Carbohydrate loading is recommended the evening before surgery and 2-4 hours before induction of anesthesia to improve perioperative insulin resistance 1, 4

Thromboembolism Prophylaxis

• The American College of Chest Physicians recommends mechanical thromboprophylaxis with well-fitted compression stockings and pharmacological prophylaxis with low-molecular-weight heparin (LMWH) or unfractionated heparin 6, 7

Key Clinical Pitfalls

• Avoid the outdated practice of routine benzodiazepine premedication, especially in elderly patients where cognitive impairment and delirium risks outweigh anxiety reduction benefits 1, 2, 3
• Do not administer gabapentinoids routinely despite their opioid-sparing effects, as sedation and visual disturbances impair early recovery 1, 2, 4

Guideline Recommendations for Procedural Anxiolytic Use

Avoidance of Long‑Acting Benzodiazepines

• The ERAS Society strongly recommends not using diazepam, clonazepam, or chlordiazepoxide for procedural anxiolysis because these agents cause prolonged psychomotor impairment lasting more than four hours after the procedure, which hampers early mobilization and recovery. Strong recommendation [8][9]

Routine Benzodiazepine Premedication

• The World Journal of Emergency Surgery advises against routine benzodiazepine premedication for all patients; benzodiazepines should be reserved only for selected individuals who continue to experience significant anxiety after non‑pharmacologic strategies have been applied. Strong recommendation [8][9]

Oral Midazolam 10 mg as the Preferred Pre‑operative Anxiolytic

Indications & Preferred Regimen

• In otherwise healthy adults younger than 60 years who have clinically significant pre‑operative anxiety, a single oral dose of 10 mg midazolam given 30–60 minutes before surgery is recommended as the first‑line benzodiazepine because it provides rapid anxiolysis, a short elimination half‑life of approximately 1.5–2.5 hours, and a favorable safety profile (guideline recommendation, 2025) 10.

Alternative Short‑acting Benzodiazepines (if Midazolam Unavailable)

• Lorazepam 1–2 mg administered sublingually 20–30 minutes before surgery may be used as an alternative short‑acting anxiolytic (guideline recommendation, 2025) 10.
• Diazepam 5–10 mg administered orally 20–30 minutes before surgery may be used as an alternative short‑acting anxiolytic (guideline recommendation, 2025) 10.

Timing Considerations

• Administering any pre‑operative benzodiazepine too close to the scheduled incision time (i.e., less than the recommended 30–60 minutes) can diminish anxiolytic efficacy because absorption and onset are incomplete (guideline recommendation, 2025) 10.

Post‑administration Safety Measures

• Patients who receive a pre‑operative benzodiazepine must have arranged transportation home to mitigate the risk of residual sedation and impaired driving (guideline recommendation, 2025) 10.