Tenoryl (Perindopril Arginine 5mg) is an ACE inhibitor used primarily to treat cardiovascular conditions.Perindopril Arginine 5mg: Perindopril is the active ingredient, and it is part of a class of medications called angiotensin-converting enzyme (ACE) inhibitors. It works by blocking the enzyme that narrows blood vessels, helping them relax and expand. This lowers blood pressure, reduces the heart's workload, and improves blood flow.