USA is a little tougher than UK. It has to be done very precisely and planned manner, if wanted to get a desired course.

Courses offered by USA can be divided technically into 3 Areas.

Area 1: Pharmacy related programs
> Pharmaceutics MS
> Pharmacology MS
> Pharm D
> Medicinal Chemistry MS
> Clinical research MS
etc

Area 2: Chemistry related programs
> Biochemistry MS
> Organic Chemistry MS
etc

Area 3: Management related programs
> MBA is the most opted for

So, any pharmacy student can apply for the any of the course above.

What do you need?*

1. UG% - 60%; equivalent to GPA - 3.0+ as most universities see
2. A GRE Score; Area 1 - 1100+, Area 2- 1000+, Area 3 - 1000+
3. TOEFL [90+] most universities in USA accept, IELTS is also accepted by certain universities
4. Recommendation letters (2 in number)
5. SOP (Statement of Purpose)
6. VISA
7. Complete Financial documentation (Recommended 18+ Lakhs INR)
8. Affidavit
9. PCAT (Pharmacy College Admission test) if you want to apply to "Pharm D. ONLY"
10. Test for Spoken English, *Some universities have this requirement, but this can be done in USA after getting admission.

*Requirements might change according to some universities.

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All you need is PLANNING and doing the things at the right time
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When to do it?
You need to get your GRE, TOEFL/IELTS scores well in advance. Lets say you will apply for next year september intake, you will need to write your GRE, TOEFL and have your scores by November of this year, and apply in november itself. This gives you the advantage of getting a scholarship. And USA, as UK is also based on the first come, first serve basis so plan your things well in advance.

Once you have your GRE, TOEFL score, you can apply to any university of your choice. Check that your qualifications match the university requirements. The application fee may cost you 50-100$ per university. So check it.

Some applications are considered even after the deadline is passed. But its good to keep things in control.

Here is the list of top pharmacy colleges in USA to help you out.
http://www.pharmacychoice.com/education/ranking.cfm