I remember a doctor telling me something about it when he was going to put me on it. I just now read some stuff about it and it doesn't seem like it's a major issue for a healthy person but people have reported elevated liver enzymes in their bloodwork with Lisinopril being the only change in diet and meds.
Got this off of EMEDTV.com, "For those taking lisinopril, there are several potential problems that may occur; liver failure is one of them. In clinical studies, ACE inhibitors, including lisinopril, have rarely been known to cause this problem. Make sure to contact your healthcare provider immediately if you notice:
•Nausea
•Tiredness
•Lethargy
•Itchy or yellowing skin
•Abdominal pain (stomach pain)
•Flu-like symptoms.
Elevated liver enzymes (found using a routine blood test) can also be a sign of liver problems due to lisinopril."