OCD MEDICATION AND SUDDEN COLLAPSES

I have OCD with intrusive thoughts and when I was aged 65 my Citalopram dosage was reduced from 40mg to 20mg. I was put on 40mg of Propranolol at this time to ease anxiety.

I have high BP and was on 20mg of Lisinopril but this was increased to 40mg in August 2020. Since this time I have collapsed three times and on each occasion ended up in A& E. The collapses are caused by sudden falls in BP. The Lisinopril has been reduced to 20mg and I am now awaiting an
appointment to see a Cardiologist. Which might be some time given Covid.

Has anyone had a similar experience
What medication changes did you have when you were 65

Any input or advice welcome

Thanks