2445
Administration of intravenous nitroglycerin in a patient with idiopathic pulmonary hypertension resulted in an increase in pulmonary artery pressure associated with a decrease in blood flow that is best explained by an increase in pulmonary vascular resistance.
 adverse event: Administration 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: Administration 