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Pre anaesthetic medication

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  • 1. Pre-Anaesthetic Medication
  • 2. PRE-ANAESTHETIC MEDICATIONIt is the term applied to theadministration of certain drugs priorto general anaesthetic agent so as tomake anaesthesia safer for thepatient.
  • 3. Objectives of Pre – Anaesthetic Medicationa. Sedation/Relief of anxiety.b. Relief of Pre-operative& Post-operative pain.c. Inhibition of Parasympathetic NS: (1) To decrease salivary & bronchial secretions (a and hence prevent reflex laryngospasm. ) (2) To prevent cardiac arrest due to vagal sti.
  • 4. d. Anti emetice. To decrease gastric acid secretion.f. For Synergic effect with General Anaesthetics & hence to decrease their adverse effects .g) drugs for patients having some specific illness e.g pheochromocytoma, thyrotoxicosis,arrythmias etc
  • 5. SEDATIVES/ANXIOLYTICS Benzodiazepine diazepam lorazepam midazolam Butyrophenones droperidol Phenothiazines promethazine
  • 6. BarbituratesOPIOID ANALGESIC morphine pethidineANTICHOLINERGIC DRUGS Aropine hyoscine glycopyrrolateANTIEMETIC Metoclopramide promethazine
  • 7. Anticholinergic Drugs They decrease secretions of air passagesS0 prevent chockingPrevent laryngospasmPrevent cardiac arrest due to excessive vagal stimu as seen with Halothanei)Atropine Sulphate2) Scopolamine (also causes amnesea)3)Glycopyrrolate(
  • 8. Drugs for prophylaxis of gastric acid aspiration TO DECREASE ACID PRODUCTION Antacid. H2 Receptor Antagonist: Ranitidine. Proton pump inhibitors Omeprazole. TO PREVENT REFLUXOF STOMACCONTENS Metoclopramide(prokinetic agent).