I have tried just about every treatment made available, and I would have to say that the plan I am on now has been the most effective for me. I home infuse with Haegarda tree times a week, but have firazyr on hand in case I get any breakthrough attacks. If Both medicines are not stopping the attack, my Plan C is going to the emergency room at Hartford Hospital, where they administer the Cinryze. I have found this to be the most effective out of all the medications I’ve Tried in the past, but that being said.. this treatment plan does not always work. It is not enough to end the attack.