As you have completed the rigorous medical education and have experience, you should choose an industry which will make use of this expertise. Pharmaceutical companies, healthcare, continuing medical education etc where the expertise of medication education and management will be used.
So an MBA will gear you in learning the management techniques, business practices, etc. If you take up a regular 2 year course, in the first year you will learn all the basic management subjects and you will be introduced to marketing, finance, HR, production etc. In the second year you have to choose an elective. You should choose an elective which you will find it easy and also work in the area for a better part of the life. So it should complement your natural abilities.
If you are good in selling, then it will be marketing, if you are a people's person, then HR so on and so forth.
In executive management course, you will get a abriged version of the management course. This is suitable for person who has already worked in corporate world and has a fair understanding of business.
All the best.