You need a arb medication telemsartan or candersartan this will prevent rbc going up and keep it in range

find the dose that doesn’t drop blood pressure to low but also corrects rbc blood levels

Start it asap retest in 4 weeks and at 4 weeks also donate blood or let blood just for prevention since it’s high now this is a must.

Report back here please once you start doctor can prescribe or order

Dose 40-80mg telemsartan
dose 16-32mg candersartan

take it before bed..