I take lisinopril. Periodically my lips have swollen. Yesterday, they started swelling again. It s the worst it s ever been. I took benadryl last night, but they are still really large. I thought it might be something I ate., but the only I ate yesterday was potatoes with onions and garlic, a bean burrito, and some pretzel sticks. Last time it happened I had previously eaten a mango (the day before). The first time I had eaten a piece of cheese.