491
Epoprostenol (prostacyclin) is currently approved for treatment of primary pulmonary hypertension; however, it is being evaluated in other forms of pulmonary hypertension, particularly scleroderma.
 potential therapeutic event: treatment 
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:
 potential therapeutic event: treatment 