Side Effects
Caution should also be exercised in the administration of morphine sulfate to patients with CNS depression, toxic psychosis, acute alcoholism and delirium tremens, and convulsive disorders.
Morphine sulfate should be used with extreme caution in patients with disorders characterized by hypoxia, since even usual therapeutic doses of narcotics may decrease respiratory drive to the point of apnea while simultaneously increasing airway resistance." - Morphine Sulfate "Warnings"