Hello. Thank you for your question and welcome to HCM. I understand your concern.
Nebivolol is a
beta-blocker that has effective and safe effects on lowering the blood pressure, but exerts minimal effect on the
heart rate. Although most beta-blockers do have an effect on heart rate, nebivolol and some other drugs from this drug class do not. However, all beta-blockers have a great effect on reducing the heart workload. That is why I think nebivolol was prescribed, in the first place. On the other hand,
olmesartan is an
angiotensin II receptor blocker (ARB) and is as effective and safe to use for blood pressure-lowering aim. In various individuals, there may be the need to switch between equally effective drug classes to see which one works the best. I think this is the case, where an ARB works better than a beta-blocker and, also, has the same effectiveness and safety in usage, by providing even lower, within normal range, blood pressure. Regarding this topic, I think there is nothing to worry about, since we aim controlling the blood pressure by setting the bar at 140/90 mmHg. Every figure under those provided, and above 100/60 mmHg, is considered normal. If I were her doctor I would continue with nebivolol or another beta-blocker, but I do also agree with switching to olmesartan. It is an individual choice of the attending doctor, and, as long it is safe and effective, I agree with him.
I hope this helps. Take care.
Best regards,
Dr. Meriton