... type pill that was very large. The mailorder house I was ordering from changed their manufacturer and sent me same mg but pill was smaller. It didn't not control my BP very well so Dr. increased me to 3 pills a day. I started wondering if the pills were off so I placed an order with WalMart mail order and they sent me a Blue 100 mg pill which seemed to work better . It was marked C-75. When I went to refill they sent me a different pill, it was white elongated numbered 167... it is the same as the previous pill that didn't work too well for me. I 'd hate to have to start taking 4 of these a day. Is anyone experiencing similar problems.