The drop out rate can be quite high, as it is a full-time degree, and pretty full-on, so you need to keep up. It is an interesting and varied course, but it can be difficult in places, like lots of organic chemistry, or statistics, if medical stats and data analysis is still taught.
The main reason, especially in some of the newer schools of pharmacy, is they are taking people onto the course who simply wouldn't have got a place 30 yrs ago when there were 15 schools of pharmacy, not the 30 we have now.
If you only get BCC or CCC at A level, and I've heard of some schools taking people with those grades, then unless you work hard, and keep up, then you possibly are going to struggle.