going through my elderly mom's pill boxes that my dad set up for her. He has passed and I am getting ready to go to the dr to get everything straightened out. I found bottles and matched all the pills, except for one pill. I cannot find any bottles for this pill. It's pink and kind of oblong shaped with a 9 then the middle of the pill has a crevice , then a 0 on the opposite side of the crevice. On the back of the pill is an A. What is it?