Morphine - Morphine depresses respiratory center in a dose dependent manner Rate | Tidal | volume In healthy individuals - no cognizable respiratory depression MARKED DEPRESSION In patients with: Asthma COPD Corpulmonalae Lungs and kidney Disease THIOPENTONE SODIUM -decreases respiratory rate KETAMINE: Bronchodilation (best IV anesthetic against causing bronchodilation) Airway reflexes are maintained Respiratory center is not depressed. d/t sympathetic stimulation the following are observed: HR CO | BP Agent of choice in: Shock( duetoo the sympathetic stimulation) bronchial asthma(as it causes bronchodilation) HALOTHANE - causes bronchodilation. Best inhalational bronchodilator followed by sevoflurane