A patient is on regular medication for medical illness. Which of the following drugs can be safely stopped with least adverse effects before an abdominal surgery

Anaesthesia

A patient is on regular medication for medical illness. Which of the following drugs can be safely stopped with least adverse effects before an abdominal surgery

Allergy in immediate perioperative period is due to:

All of the following are true about lumbar puncture except:

Which of these is most commonly used as pre-anesthetic medication?