Will you please suggest me which course is better after B.Pharm - M.Pharm or MBA???

It is difficult to answer that which course is good for post graduation as both of them have their own advantages and drawbacks. Its all depend on your interest

Master in pharmacy--
-Master in pharmacy is deviated in various different fields.
-By recent field report, M.Pharm in pharmaceutics is most valuable in India where as in US and other foreign countries pharmacology is well established.
-Pharmaceutics is unique subject deals with all F&D, production etc. so, scope is clear.
-Though some places of pharmacology are absorbed by MBBS but M.Pharm in pharmacology is competitive with MBBS.
-A person with Pharmacology can enter in preclinical and clinical studies.
-Recent Market shows that M.Pharm with chemistry are less absorbed in industry than B.Sc, Chemistry.
-Pharma-analysis is other important line where one can go for QA, QC etc. And other fields like biotech, microbiology have less chance in it. It is unique, so you can also go for it.

MBA
-If you are very good in management and personally have leadership quality just get in to MBA.
-Pharma MBA is most demanded in market. You are from pharmacy background, therefore you can get more beneficial than others.
- In recent economic recession only pharma-industries are remain unaffected or less effected than any other industries in the world.
-Other than it, HR studies is also valuable in any companies or industries.

I will suggest you don't run behind scope or money but go for such a training or education where you have interest and application of knowledge. So that you can justify yourself regarding suitable field in which you are getting fit.