ACE-inhibitors or ARB agents can be used to treat chronic kidney disease (CKD). The Ramipril you mentioned is an ACE-inhibitor. The Irbesartan that you mention is an ARB agent. Either one but not both should be used to treat your CKD. The excess protein in your urine (proteinuria) is a specific indication for use of either the ACE-inhibitor or the ARB agent. I suggest that you discuss this with your nephrologist.
For more information on ACE inhibitors click here: