<prompt> Gastric Lavage is contraindicated in poisoning -KeroseneOrganophosphorusAresenicMorphine  <response>: Gastric Lavage Indications -- Conscious patient -- Ingestion of poison within 1 to 2 hour. Contraindications -- Comaconvulsionunconscious patient -- Impaired gag reflex -- Corrosivevolatile poison ingestion -- Marked hypothermia -- esophageal varices -- Significant electrolyte imbalance. Complications -- Aspiration pneumonia -- Mallory Weiss tears -- Perforation of esophagusstomach -- Laryngospasm -- Hypothermia -- Electrolyte imbalance Procedure -- Protect airway -- Place patient on lateral position -- Tube should be passed orally -- Lubricate the inseing end of tube -- Use mouth gag -- The position of tube in stomach should be confirmed -- Lavage is carried out with saline or water. Precautions -- Never embark on procedure as routine -- Do not do in non-toxic agent ingestion -- Obtain consent and explain procedure Agents used -- Ewald tube -- Lavacuator -- Ryles tube in children -- Boas tube REF:THE SYNOPSIS OF FORENSIC MEDICINE AND TOXICOLOGY:K S NARAYANA REDDY;PAGE NO 287 