This has more to do with you than the drug. People vary in how much C-1 inhibitor they have to remove the bradykinin.

http://www.nejm.org/doi/full/10.1056...00208223470820

The cough is only one symptom of this. Tissue swelling leads to pain all types of odd symptoms, as the nerves become compressed. The swelling of the intestines in the abdomen leads to pain and misdiagnosis of gastrointestinal disorders.

If it hits your lungs, you may die suddenly with throat closure or larynx paralysis. Swelling of the fingers and toes can be common as well as skin flushing and burning.

If you tend to react to bug bites and minor things like injections with swelling and redness, this is a potential warning sign also.
Some people have swelling tongue and lips, that comes and goes also. Dull pain in the face as you describe also could be sinus congestion, compressing a nerve. It takes about a month or two to come down off this excess bradykinin. I didn't really feel normal for about a year. Today my hands are no longer swollen or my feet.