How long does it take for swelling to go down in lip from allergic reaction to medication from lisinopril?

A few days. Angioedema, or the swelling in your face and/or neck caused by certain medications, typically resolves within 7-10 days after you stop the medication but may last up to 4-6 weeks. Go to the er immediately if you experience chest pain, shortness of breath, dizziness, or swelling in your throat.
A couple of days. Swelling from lisinopril, or ace inhibitors, is a consequence of how this class of medications works. It is not a true drug allergy. After stopping the medication, swelling usually resolves within a day or two.