Angioedema: It could be either from Lisinopril or flu shot. Difficult to delineate. Lisinopril could cause angioedema/tongue swelling at any point of time within first 6 months of its usage. After that it is very remote or unlikely. Flu shots also cause angioedema.
Answered 6/27/2014
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See an Oral Surgeon : Don't mess around with a swollen tongue as you have to be careful with a possible obstructed airway. Doubt it is due to the flu shot but perhaps he has an allergy to something there. Consider an antihistamine like Benadryl (diphenhydramine) and see a specialist
Answered 10/21/2015
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