Perindopril More Drug_warnings_recalls What To Do If A Patient On 2mg Perindopril Sees A Continuous Decrease In Blood Pressure (current BP 83/59)?

What to do if a patient on 2mg Perindopril sees a continuous decrease in blood pressure (current BP 83/59)? - perindopril more drug_warnings_recalls

My father was in the perindopril (Coversyl) for about 2 weeks after surgery, heart valve repair. However, his blood pressure has been increasing since leaving the hospital (with a blood pressure of 105/63) and now dropped his 83/59. Is it a concern? Please share.