I'm just wondering why it matters if you get different brands of levothyroxine. Is it important to stay with the same one. At the moment I am taking 25 mcg Wockhardt one day and 50 mcg Northstar the next. Is this combination ok? Would be grateful for any advice. I was only diagnosed in October so don't know what I'm doing really. Without this site i would be totally at a loss. Thank you so much for all your help.