Taking perindopril ace inhibitor for essential hypertension since last four years. is it possible that there can be angioedema occurring now.

Edema: Ace inhibitors are a wonderful class of antihypertensive agents. However, known side effects include angioedema, other words fluid retention and low potassium levels. Allergic reactions can occur at any time during drug use, even after periods of no symptoms

Possible: While most side effects from drugs occur within the first month of taking a medication, there have been some cases reported of delayed reactions.