isocort or HC

I am 72 years old male having AF. I started taking isocort six months back. isocort is giving me fairly good relef compared to other treatments I had tried before. Bezwecken, manufacturer of isocort, HAVE NOT included isocort as one of its products it its website. IHERB's site tells that they have discontinued selling isocort. Few others are still selling isocort. I am afraid that the company has stopped manufacture of isocort and after retail stock is exhausted I may not be able to buy isocort. I have not so far tried HC as I was afraid. Shall I switch over to HC now.