Amlodipine
I'm a US FAA Sr AME...posting here for the first time. Hope I can help out from time to time on generic aeromedical issues and not CAA-equivalent FARs. Amlodipine, trade name Norvasc, is a pretty decent choice for a blood pressure medication for a pilot. It should not interfere with situational awareness, executive functioning, or vigilance. The downside to this class of meds, known as calcium channel blockers, is some fluid retention that can cause ankle swelling. So if you're stuck on the flight deck for extended periods of time then you may want to watch for this side effect.