I have done B.Sc. in Forestry from Nepal. I would like to change in career to Medical field. I don't know which field in the medical will be better to pursue. I would like to spend 2-3 years in study so that I can go to the job market.

Since you only want to spend 2-3 years in study, I guess we can rule out MD or MBBS. Can you a bit more specific as to what you would like to do because your question is really vague...

Basically, it could be Master's degree course with some prerequisites so that I can complete within 2-3 years. I heard about the Accelerated Nursing Course and Physical Therapy. I don't know details of the job market about these. If there are some more please share with me. I am looking for the university in North Texas though.

fix the Top or the bottom? dentist or Gynecologist. Both make tons of money.

Bro: I strongly doubt you will be eligible for Master's degree in Nursing or Physical Therapy with your undergrad in Forestry... In any case, let us know when you find out...

on a serious note, why dont you go to a tech school or a career school. its like two years of college crammed into one, they offer many medical fields classes and even help you get a job in that feild. My cousin sister just graduated to be Medical assistant and she is already working in a hospital.

if u wanna jump into PT u need to take GRE and match their prereqs first.

J Mann lagchha tehi padhne ho....Study what you love to do. Not what you hope will earn money!

Better to go for forestry bro rather than taking all  prerequisite for medicine.  To go for medicine, you will need tons of green papers in your pocket.

Well, If you really try you will get any thing you want. Even a art student can got to Medical school but as other said you may  have to take many classes. Do not think what ever we say or advise  here  is from the University Coordinator and 100% right. We are just expressing our views in various mode, someone being funny someone being sincere and someone being modest and so forth. You must able to filter it and that is what sajha is. 

Study Pharmacy, easy to get a job when you finish.  But don't become a professional student, always changing fields.  You can waste a lot of time and money.  Maybe you are just afraid to face the real world?