Thank you so much, Lily, for taking the time to explain all this. I do have to take the diltiazem (cardizem) for the PH or... well... it's not good. I can't take beta blockers or ace inhibitors because I've had severe asthmatic reactions. You're right, if I have to take it I have to take it. I was taking it for a few years before being diagnosed, but we BELIEVE some hospitalizations years prior to starting it were flares. You're right. Call it a zebra or a horse, it needs fed the same way. THANKS!