Rugbyears, your blood pressure should be no reason to fail your C1 medical. My blood pressure was a lot higher then yours and I still passed my C1 medical.
Had a 24 hour blood pressure monitor and average blood pressure was still a bit on the high side. AME adviced to go on medication if I still plan on keeping flying for another 25/30 years.
According to my AME and the specialist in hospital there was no other option then using medication. Even losing a bit of weight (I am 1.80m and 84Kgs) wouldn't make a diffrence. However I stand to be corrected, not a doctor myself and can only relay what my AME has said.