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How long does lisinopril 10mg ACE Inhibitor stay in your system?   Answer   Answer The plasma half-life of lisinopril is approximately 12 hours. This means that in the average person, lisinopril should disappear from the body withâ¦in 3-4 days.
When treating high blood pressure, the recommended dosage is 10 mg, taken once daily. For congestive heart failure, the starting dose is 5 mg a day. When given following a heart attack, lisinopril dosage guidelines call for 5 mg to start, then another 5 mg in 24 hours, and then 10 mg at 48 hours.