Hello

Yes you can write Neet examination even though you are continuing  with the courses of B pharmacy. If you passed 10+2 examination with science subjects like physics chemistry biology and English with at least 55% marks if you belong to general category candidate and if you belong to  SC& ST  you have to secure at least 50% marks in 12th class science examination. After appearing the neet examination if you qualify it with good score then you can take admission in MBBS, BDS etc courses, you should have to leave the the B pharmacy course and join MBBS and BDS etc courses of your choice.

Hope this helps.