Corticosteroids are also used supportively to prevent nausea, often in combination with 5-HT3 antagonists (e.g. ondansetron). Typical undesired effects of glucocorticoids present quite uniformly as drug-induced Cushing's syndrome.
Common causes. A gas explosion occurs when the gas/air mixture reaches a critical value, then any spark, flame or heat source can ignite the mixture. The explosion is caused when the rapidly expanding, burning gas is confined and builds up pressure. As the pressure builds, something has to give, and in a home gas explosion it is usually the windows.
1 A rich flashover occurs when the flammable gases are ignited while at the upper region of the flammability range (i.e. rich). 2  This can happen in rooms where the fire subsided because of lack of oxygen. 3  The ignition source can be a smouldering object, or the stirring up of embers by the air track.