Well, it entirely depends on your results during MPharm...if you are really good you can skip the post graduate masters IINM...

i have two lecturers who did that..which was quite a number of years ago..so i can't confirm whether you can do like this again... i also heard somewhere that a postgraduate masters is necessary irregardless of your degree grades..please do double confirm if you plan to hop on the PhD bandwagon somewhere in the near future.