What are the long term side effects of lisinopril?

Overall safe. Most common is a nuisance cough. Most serious is swelling of lips and throat which can cause breathing difficulties. Rash can occur. There may be a worsening of kidney function rarely if you have blockage in blood vessels to both kidneys. Sometimes it can also cause high potassium. Overall it is a safe, inexpensive and very useful medicine!
High potassium. Its a great drug and i write it often, but u need to check for high potassium occ. Some people's also can develop a chronic cough.